Script library. Problem with following guide

Hello,

Im using Ready! API 1.4.1, SoapUI NG PRO.

Im trying to build my script library using guide - http://www.soapui.org/scripting---properties/scripting-and-the-script-library.html. But i have some problem.

Path to library script folder in preferences: D:\SOAPUI\scripts

Path to file: D:\SOAPUI\scripts\soapui\demo\Callee.groovy

File content:

package soapui.demo

//Callee.groovy
class Callee {
  String hello() {
     return "hello, world"
  }
  
  def static salute( who, log ) { log.info "Hello again $who!" }
}

Groovy script step content:

//Caller.groovy
c = new Callee()
log.info c.hello("Mike")

When Im trying to run this step i got error:

org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed: Script3.groovy: 2: unable to resolve class Callee @ line 2, column 5. c = new Callee() ^ org.codehaus.groovy.syntax.SyntaxException: unable to resolve class Callee @ line 2, column 5. at org.codehaus.groovy.ast.ClassCodeVisitorSupport.addError(ClassCodeVisitorSupport.java:146) at org.codehaus.groovy.control.ResolveVisitor.resolveOrFail(ResolveVisitor.java:261) at org.codehaus.groovy.control.ResolveVisitor.resolveOrFail(ResolveVisitor.java:271) at org.codehaus.groovy.control.ResolveVisitor.transformConstructorCallExpression(ResolveVisitor.java:1046) at org.codehaus.groovy.control.ResolveVisitor.transform(ResolveVisitor.java:705) at org.codehaus.groovy.control.ResolveVisitor.transformBinaryExpression(ResolveVisitor.java:1014) at org.codehaus.groovy.control.ResolveVisitor.transform(ResolveVisitor.java:699) at org.codehaus.groovy.ast.ClassCodeExpressionTransformer.visitExpressionStatement(ClassCodeExpressionTransformer.java:139) at org.codehaus.groovy.ast.stmt.ExpressionStatement.visit(ExpressionStatement.java:40) at org.codehaus.groovy.ast.CodeVisitorSupport.visitBlockStatement(CodeVisitorSupport.java:35) at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitBlockStatement(ClassCodeVisitorSupport.java:163) at org.codehaus.groovy.control.ResolveVisitor.visitBlockStatement(ResolveVisitor.java:1317) at org.codehaus.groovy.ast.stmt.BlockStatement.visit(BlockStatement.java:69) at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitClassCodeContainer(ClassCodeVisitorSupport.java:101) at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitConstructorOrMethod(ClassCodeVisitorSupport.java:112) at org.codehaus.groovy.ast.ClassCodeExpressionTransformer.visitConstructorOrMethod(ClassCodeExpressionTransformer.java:50) at org.codehaus.groovy.control.ResolveVisitor.visitConstructorOrMethod(ResolveVisitor.java:200) at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitMethod(ClassCodeVisitorSupport.java:123) at org.codehaus.groovy.ast.ClassNode.visitContents(ClassNode.java:1083) at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitClass(ClassCodeVisitorSupport.java:50) at org.codehaus.groovy.control.ResolveVisitor.visitClass(ResolveVisitor.java:1260) at org.codehaus.groovy.control.ResolveVisitor.startResolving(ResolveVisitor.java:175) at org.codehaus.groovy.control.CompilationUnit$11.call(CompilationUnit.java:648) at org.codehaus.groovy.control.CompilationUnit.applyToSourceUnits(CompilationUnit.java:928) at org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(CompilationUnit.java:590) at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:539) at groovy.lang.GroovyClassLoader.doParseClass(GroovyClassLoader.java:297) at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:267) at groovy.lang.GroovyShell.parseClass(GroovyShell.java:692) at groovy.lang.GroovyShell.parse(GroovyShell.java:704) at groovy.lang.GroovyShell.parse(GroovyShell.java:740) at groovy.lang.GroovyShell.parse(GroovyShell.java:731) at com.eviware.soapui.support.scripting.groovy.SoapUIGroovyScriptEngine.compile(SoapUIGroovyScriptEngine.java:138) at com.eviware.soapui.support.scripting.groovy.SoapUIGroovyScriptEngine.run(SoapUIGroovyScriptEngine.java:89) at com.eviware.soapui.support.scripting.groovy.SoapUIProGroovyScriptEngineFactory$SoapUIProGroovyScriptEngine.run(SoapUIProGroovyScriptEngineFactory.java:76) at com.eviware.soapui.impl.wsdl.teststeps.WsdlGroovyScriptTestStep.run(WsdlGroovyScriptTestStep.java:155) at com.eviware.soapui.impl.wsdl.panels.teststeps.GroovyScriptStepDesktopPanel$RunAction$1.run(GroovyScriptStepDesktopPanel.java:263) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) 1 error

What am I doing wrong?