readyapi can't find custom groovy script

I added my custom groovy script Utilities.groovy file to C:\Program Files\SmartBear\ReadyAPI-3.49.0\bin\scripts but when I add following to groovy script step it is giving error;

import Utilities

error: 

org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:

Script8.groovy: 1: unable to resolve class Utilities

 @ line 1, column 1.

   import Utilities

   ^

org.codehaus.groovy.syntax.SyntaxException: unable to resolve class Utilities

 @ line 1, column 1.

at org.codehaus.groovy.ast.ClassCodeVisitorSupport.addError(ClassCodeVisitorSupport.java:262)

at org.codehaus.groovy.control.ResolveVisitor.visitClass(ResolveVisitor.java:1434)

at org.codehaus.groovy.control.ResolveVisitor.startResolving(ResolveVisitor.java:262)

at org.codehaus.groovy.control.CompilationUnit.lambda$new$16(CompilationUnit.java:739)

at org.codehaus.groovy.control.CompilationUnit$ISourceUnitOperation.doPhaseOperation(CompilationUnit.java:902)

at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:628)

at groovy.lang.GroovyClassLoader.doParseClass(GroovyClassLoader.java:389)

at groovy.lang.GroovyClassLoader.lambda$parseClass$3(GroovyClassLoader.java:332)

at org.codehaus.groovy.runtime.memoize.StampedCommonCache.compute(StampedCommonCache.java:163)

at org.codehaus.groovy.runtime.memoize.StampedCommonCache.getAndPut(StampedCommonCache.java:154)

at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:330)

at groovy.lang.GroovyShell.parseClass(GroovyShell.java:526)

at groovy.lang.GroovyShell.parse(GroovyShell.java:538)

at groovy.lang.GroovyShell.parse(GroovyShell.java:570)

at groovy.lang.GroovyShell.parse(GroovyShell.java:565)

at com.eviware.soapui.support.scripting.groovy.SoapUIGroovyScriptEngine.recompileWithNewName(SoapUIGroovyScriptEngine.java:167)

at com.eviware.soapui.support.scripting.groovy.SoapUIGroovyScriptEngine.compile(SoapUIGroovyScriptEngine.java:155)

at com.eviware.soapui.support.scripting.groovy.SoapUIGroovyScriptEngine.run(SoapUIGroovyScriptEngine.java:98)

at com.eviware.soapui.support.scripting.groovy.SoapUIProGroovyScriptEngineFactory$SoapUIProGroovyScriptEngine.run(SoapUIProGroovyScriptEngineFactory.java:98)

at com.eviware.soapui.impl.wsdl.teststeps.WsdlGroovyScriptTestStep.run(WsdlGroovyScriptTestStep.java:159)

at com.eviware.soapui.impl.wsdl.panels.teststeps.GroovyScriptStepDesktopPanel$RunAction$1.run(GroovyScriptStepDesktopPanel.java:344)

at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)

at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)

at java.base/java.lang.Thread.run(Thread.java:833)

 

1 error

 

See Error Log for details.

 

the followings groovy jars I have in C:\Program Files\SmartBear\ReadyAPI-3.49.0\lib

not sure what is missing? thanks in advance