SoapUI Pro 4.0.1 with budled Java fails to access log file

When running SoapUI Pro 4.0.1 (with evaluation license) with budled Java, SoapUI fails to configure log4j

Configuring log4j from [C:\Program Files (x86)\SmartBear\soapUI-Pro-4.0.1\bin\soapui-log4j.xml] log4j:ERROR setFile(null,true) call failed. java.io.FileNotFoundException: soapui-errors.log (Access is denied)

(detailed log below). I'm running the tool in Windows 7, 64bits.

What could be the reason?

Detailed log

Configuring log4j from [C:\Program Files (x86)\SmartBear\soapUI-Pro-4.0.1\bin\soapui-log4j.xml] log4j:ERROR setFile(null,true) call failed. java.io.FileNotFoundException: soapui-errors.log (Access is denied) at java.io.FileOutputStream.openAppend(Native Method) at java.io.FileOutputStream.<init>(Unknown Source) at java.io.FileOutputStream.<init>(Unknown Source) at org.apache.log4j.FileAppender.setFile(FileAppender.java:289) at org.apache.log4j.RollingFileAppender.setFile(RollingFileAppender.java:167) at org.apache.log4j.FileAppender.activateOptions(FileAppender.java:163) at org.apache.log4j.config.PropertySetter.activate(PropertySetter.java:256) at org.apache.log4j.xml.DOMConfigurator.parseAppender(DOMConfigurator.java:220) at org.apache.log4j.xml.DOMConfigurator.findAppenderByName(DOMConfigurator.java:150) at org.apache.log4j.xml.DOMConfigurator.findAppenderByReference(DOMConfigurator.java:163) at org.apache.log4j.xml.DOMConfigurator.parseChildrenOfLoggerElement(DOMConfigurator.java:425) at org.apache.log4j.xml.DOMConfigurator.parseCategory(DOMConfigurator.java:345) at org.apache.log4j.xml.DOMConfigurator.parse(DOMConfigurator.java:827) at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:712) at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:604) at org.apache.log4j.xml.XMLWatchdog.doOnChange(DOMConfigurator.java:861) at org.apache.log4j.helpers.FileWatchdog.checkAndConfigure(FileWatchdog.java:88) at org.apache.log4j.helpers.FileWatchdog.<init>(FileWatchdog.java:57) at org.apache.log4j.xml.XMLWatchdog.<init>(DOMConfigurator.java:853) at org.apache.log4j.xml.DOMConfigurator.configureAndWatch(DOMConfigurator.java:584) at com.eviware.soapui.DefaultSoapUICore.initLog(DefaultSoapUICore.java:494) at com.eviware.soapui.DefaultSoapUICore.init(DefaultSoapUICore.java:137) at com.eviware.soapui.SoapUIPro$SoapUIProCore.init(SourceFile:919) at com.eviware.soapui.SoapUIPro$SoapUIProCore.<init>(SourceFile:900) at com.eviware.soapui.SoapUIPro.b(SourceFile:285) at com.eviware.soapui.SoapUIPro.a(SourceFile:199) at com.eviware.soapui.SoapUIPro$SoapUIProRunner.run(SourceFile:1434) at com.eviware.soapui.SoapUIPro.main(SourceFile:251) log4j:ERROR setFile(null,false) call failed. java.io.FileNotFoundException: soapui.log (Access is denied) at java.io.FileOutputStream.open(Native Method) at java.io.FileOutputStream.<init>(Unknown Source) at java.io.FileOutputStream.<init>(Unknown Source) at org.apache.log4j.FileAppender.setFile(FileAppender.java:289) at org.apache.log4j.RollingFileAppender.setFile(RollingFileAppender.java:167) at org.apache.log4j.FileAppender.activateOptions(FileAppender.java:163) at org.apache.log4j.config.PropertySetter.activate(PropertySetter.java:256) at org.apache.log4j.xml.DOMConfigurator.parseAppender(DOMConfigurator.java:220) at org.apache.log4j.xml.DOMConfigurator.findAppenderByName(DOMConfigurator.java:150) at org.apache.log4j.xml.DOMConfigurator.findAppenderByReference(DOMConfigurator.java:163) at org.apache.log4j.xml.DOMConfigurator.parseChildrenOfLoggerElement(DOMConfigurator.java:425) at org.apache.log4j.xml.DOMConfigurator.parseRoot(DOMConfigurator.java:394) at org.apache.log4j.xml.DOMConfigurator.parse(DOMConfigurator.java:829) at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:712) at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:604) at org.apache.log4j.xml.XMLWatchdog.doOnChange(DOMConfigurator.java:861) at org.apache.log4j.helpers.FileWatchdog.checkAndConfigure(FileWatchdog.java:88) at org.apache.log4j.helpers.FileWatchdog.<init>(FileWatchdog.java:57) at org.apache.log4j.xml.XMLWatchdog.<init>(DOMConfigurator.java:853) at org.apache.log4j.xml.DOMConfigurator.configureAndWatch(DOMConfigurator.java:584) at com.eviware.soapui.DefaultSoapUICore.initLog(DefaultSoapUICore.java:494) at com.eviware.soapui.DefaultSoapUICore.init(DefaultSoapUICore.java:137) at com.eviware.soapui.SoapUIPro$SoapUIProCore.init(SourceFile:919) at com.eviware.soapui.SoapUIPro$SoapUIProCore.<init>(SourceFile:900) at com.eviware.soapui.SoapUIPro.b(SourceFile:285) at com.eviware.soapui.SoapUIPro.a(SourceFile:199) at com.eviware.soapui.SoapUIPro$SoapUIProRunner.run(SourceFile:1434) at com.eviware.soapui.SoapUIPro.main(SourceFile:251) 17:18:55,552 INFO [SoapUI] Adding [C:\Program Files (x86)\SmartBear\soapUI-Pro-4.0.1\bin\ext\mysql-connector-java-5.1.13.jar] to extensions classpath 17:18:55,929 INFO [DefaultSoapUICore] initialized soapui-settings from [C:\Users\mgawinecki\soapui-settings.xml] 17:18:56,551 INFO [SoapUIProGroovyScriptEngineFactory] Setting Script Library to [C:\PROGRA~2\SMARTB~1\SOAPUI~1.1\bin\scripts] 17:18:56,553 INFO [DefaultSoapUICore] Adding listeners from [C:\Program Files (x86)\SmartBear\soapUI-Pro-4.0.1\bin\listeners\demo-listeners .xml] 17:18:57,022 INFO [WorkspaceImpl] Loading workspace from [C:\Users\mgawinecki\default-soapui-workspace.xml] 17:18:57,170 INFO [WsdlProject] Loaded project from [file:/C:/Users/mgawinecki/Documents/Global-Weather-soapui-project.xml] 17:18:57,399 INFO [WsdlProject] Loaded project from [file:/C:/Users/mgawinecki/Documents/AWSECommerceService-wsdl-soapui-project.xml] 17:18:57,856 INFO [SoapUI] Used java version: 1.6.0_26 17:18:58,654 INFO [DefaultSoapUICore] Adding actions from [C:\Program Files (x86)\SmartBear\soapUI-Pro-4.0.1\bin\actions\demo-actions.xml]