Can't create new VHDL file

Hi,
ich just recently found Sigasi and I installed the tool today using Eclipse Indigo and Win XP. The following errors occured:
1. I can't set the heap size to -Xmx1400m as every value greater than 1000 results in a not starting Eclipse
2. after creating a project I wanted to create a new VHDL file. The program itself does nothing and the error console shows an unhandled event loop exception with the followng content:

eclipse.buildId=M20110909-1335
java.version=1.5.0_06
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=de_DE
Framework arguments: -product org.eclipse.epp.package.cpp.product
Command-line arguments: -os win32 -ws win32 -arch x86 -product org.eclipse.epp.package.cpp.product

Error
Sat Jan 21 16:39:53 CET 2012
Unhandled event loop exception

java.lang.NoSuchMethodError: java.util.Arrays.copyOf([BI)[B at org.eclipse.xtext.nodemodel.serialization.SerializationUtil.getCompleteContent(SerializationUtil.java:119) at org.eclipse.xtext.linking.lazy.LazyLinkingResource.doLoad(LazyLinkingResource.java:85) at org.eclipse.emf.ecore.resource.impl.ResourceImpl.load(ResourceImpl.java:1511) at org.eclipse.xtext.ui.codetemplates.ui.partialEditing.PartialModelEditor.createResource(PartialModelEditor.java:64) at org.eclipse.xtext.ui.codetemplates.ui.partialEditing.PartialModelEditor.setModel(PartialModelEditor.java:46) at org.eclipse.xtext.ui.codetemplates.ui.partialEditing.SourceViewerHandle.createPartialEditor(SourceViewerHandle.java:54) at org.eclipse.xtext.ui.codetemplates.ui.partialEditing.SourceViewerHandle.createPartialEditor(SourceViewerHandle.java:59) at com.sigasi.hdt.vhdl.ui.wizard.VhdlNewFileWizardPage.createViewer(VhdlNewFileWizardPage.java:35) at com.sigasi.hdt.vhdl.ui.wizard.VhdlNewFileWizardPage.createControl(VhdlNewFileWizardPage.java:117) at org.eclipse.jface.wizard.Wizard.createPageControls(Wizard.java:174) at org.eclipse.jface.wizard.WizardDialog.createPageControls(WizardDialog.java:736) at org.eclipse.jface.wizard.WizardDialog.createContents(WizardDialog.java:608) at org.eclipse.jface.window.Window.create(Window.java:431) at org.eclipse.jface.dialogs.Dialog.create(Dialog.java:1089) at org.eclipse.ui.internal.actions.NewWizardShortcutAction.run(NewWizardShortcutAction.java:122) at org.eclipse.jface.action.Action.runWithEvent(Action.java:498) at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:584) at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:501) at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:411) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4165) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3754) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2696) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2660) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2494) at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:674) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:667) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:344) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:622) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577) at org.eclipse.equinox.launcher.Main.run(Main.java:1410)

Do I have to install any other Eclipse plugins to make Sigasi work??

system requirements.

Hi,

If you cannot increase the heap size, you probably don't have enough physical memory. We recommend at least 2GB of RAM.

You are probably running Eclipse on a Java 5 Runtime Environment (JRE). Please upgrade to Java 6, or download the standalone version, which is shipped with the correct Java version.

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