org.codehaus.groovy.control.MultipleCompilationErrorsException on updation from 5.2.1 to 5.3.0

I updated my soapui from 5.2.1 to 5.3.0

now when i am running my groovy script, i am receiving following error.

org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed: Script8.groovy: 3: unable to resolve class com.ecologic.qa.api.GetHostName @ line 3, column 1. import com.ecologic.qa.api.GetHostName; ^ org.codehaus.groovy.syntax.SyntaxException: unable to resolve class com.ecologic.qa.api.GetHostName @ line 3, column 1. at org.codehaus.groovy.ast.ClassCodeVisitorSupport.addError(ClassCodeVisitorSupport.java:146) at org.codehaus.groovy.control.ResolveVisitor.visitClass(ResolveVisitor.java:1145) at org.codehaus.groovy.control.ResolveVisitor.startResolving(ResolveVisitor.java:141) at org.codehaus.groovy.control.CompilationUnit$10.call(CompilationUnit.java:632) at org.codehaus.groovy.control.CompilationUnit.applyToSourceUnits(CompilationUnit.java:912) at org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(CompilationUnit.java:574) at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:523) at groovy.lang.GroovyClassLoader.doParseClass(GroovyClassLoader.java:279) at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:258) at groovy.lang.GroovyShell.parseClass(GroovyShell.java:613) at groovy.lang.GroovyShell.parse(GroovyShell.java:625) at groovy.lang.GroovyShell.parse(GroovyShell.java:652) at groovy.lang.GroovyShell.parse(GroovyShell.java:643) at com.eviware.soapui.support.scripting.groovy.SoapUIGroovyScriptEngine.compile(SoapUIGroovyScriptEngine.java:136) at com.eviware.soapui.support.scripting.groovy.SoapUIGroovyScriptEngine.run(SoapUIGroovyScriptEngine.java:87) at com.eviware.soapui.impl.wsdl.teststeps.WsdlGroovyScriptTestStep.run(WsdlGroovyScriptTestStep.java:141) at com.eviware.soapui.impl.wsdl.panels.teststeps.GroovyScriptStepDesktopPanel$RunAction$1.run(GroovyScriptStepDesktopPanel.java:250) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) 1 error

This is the groovy code I am using:

import com.eviware.soapui.impl.wsdl.WsdlProject;
import com.ecologic.qa.api.GetHostName;

//Set Up IP
WsdlProject project = (WsdlProject) testRunner.getTestCase().getTestSuite().getProject();

String ip = com.ecologic.qa.api.GetHostName.getIP();

project.setPropertyValue("ReplyAddress","http://" + ip + ":8088/mockSOAP");
log.info(project.getPropertyValue("ReplyAddress"));

//Set up environment
com.ecologic.qa.api.SoapUI.GetAPI(testRunner, log, context).PromptForSetup();

//Set up Security
com.ecologic.qa.security.SetSecurityCredentialsGUI.setCredentials(testRunner,log,context);