Grails installation probblem

[akizub]

I tried to install Grails and have permanent error:

Starting Grails Environment ...

Type "help" to see available commands.

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

[C:\grails-1.0.3]
grails:\>grails
Error starting Grails: org.apache.tools.ant.helper.AntXMLContext.setCurre ntTarge
ts(Ljava/util/MapV
java.lang.NoSuchMethodError: org.apache.tools.ant.helper.AntXMLContext.setCurre n
tTargets(Ljava/util/MapV
at groovy.util.AntBuilder.<init>(AntBuilder.java:80)
at groovy.util.AntBuilder.<init>(AntBuilder.java:67)
at groovy.util.AntBuilder.<init>(AntBuilder.java:63)
at sun.reflect.NativeConstructorAccessorImpl.newInsta nce0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInsta nce(NativeConstruct
orAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newI nstance(DelegatingC
onstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Construc tor.java:494)
at org.codehaus.groovy.runtime.MetaClassHelper.doCons tructorInvoke(MetaC
lassHelper.java:535)
at groovy.lang.MetaClassImpl.doConstructorInvoke(Meta ClassImpl.java:2356
)
at groovy.lang.MetaClassImpl.invokeConstructor(MetaCl assImpl.java:1255)
at groovy.lang.MetaClassImpl.invokeConstructor(MetaCl assImpl.java:1185)
at org.codehaus.groovy.runtime.InvokerHelper.invokeCo nstructorOf(Invoker
Helper.java:809)
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter. invokeNewN(ScriptBy
tecodeAdapter.java:230)
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter. invokeNew0(ScriptBy
tecodeAdapter.java:237)
at org.codehaus.groovy.grails.cli.GrailsScriptRunner. <clinit>(GrailsScri
ptRunner.groovy:36)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ e Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Native MethodAccessorImpl.
java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.codehaus.groovy.grails.cli.support.GrailsStart er.rootLoader(Grail
sStarter.java:140)
at org.codehaus.groovy.grails.cli.support.GrailsStart er.main(GrailsStart
er.java:165)
[C:\grails-1.0.3]
grails:\>

I don't want to debug Grails but, at least, I'm sure (doublechecked!) that method org.apache.tools.ant.helper.AntXMLContext.setCurre ntTarge
ts(Ljava/util/MapV does exist in ant.jar (in both!).

Alex.