project was not built due to "Problems encountered
while deleting

Please need help when i try to rebuild project....i was experienceing this
issue.<br />
<p />
<br />
Studio/Application Developer/v5.1.2/eclipse/<br />
!ENTRY org.eclipse.jdt.core 4 4 Mar 06, 2008 13:20:04.633<br />
!MESSAGE JavaBuilder handling ImageBuilderInternalException<br />
!STACK 1<br />
org.eclipse.core.internal.resources.ResourceException: Problems encountered
while deleting resources.<br />
	at java.lang.Throwable.&lt;init&gt;(Throwable.java)<br />
	at java.lang.Throwable.&lt;init&gt;(Throwable.java)<br />
	at
org.eclipse.core.runtime.CoreException.&lt;init&gt;(CoreException.java:3
5)<br />
	at
org.eclipse.core.internal.resources.ResourceException.&lt;init&gt;(Resou
rceException.java:39)<br />
	at org.eclipse.core.internal.resources.Resource.delete(Resource.java:656)<br
/>
	at
org.eclipse.jdt.internal.core.builder.BatchImageBuilder.cleanOutputFolders(Batch
ImageBuilder.java:121)<br />
	at
org.eclipse.jdt.internal.core.builder.BatchImageBuilder.build(BatchImageBuilder.
java:37)<br />
	at
org.eclipse.jdt.internal.core.builder.JavaBuilder.buildAll(JavaBuilder.java:194)
<br />
	at
org.eclipse.jdt.internal.core.builder.JavaBuilder.build(JavaBuilder.java:117)<
;br />
	at
org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:427)<br
/>
	at
org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java)<
;br />
	at org.eclipse.core.runtime.Platform.run(Platform.java)<br />
	at
org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:125)&
lt;br />
	at
org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:181)&
lt;br />
	at
org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:191)&
lt;br />
	at
org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:151)<br
/>
	at
org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java)<
;br />
	at org.eclipse.core.runtime.Platform.run(Platform.java)<br />
	at
org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:165)&
lt;br />
	at
org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:265)<br
/>
	at org.eclipse.core.internal.resources.Project.build(Project.java:85)<br
/>
	at
org.eclipse.ui.actions.BuildAction.invokeOperation(BuildAction.java:156)<br
/>
	at
org.eclipse.ui.actions.WorkspaceAction.execute(WorkspaceAction.java:122)<br
/>
	at
org.eclipse.ui.actions.WorkspaceAction$1.execute(WorkspaceAction.java:279)<br
/>
	at
org.eclipse.ui.actions.WorkspaceModifyOperation$1.run(WorkspaceModifyOperation.j
ava:71)<br />
	at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1595)<br
/>
	at
org.eclipse.ui.actions.WorkspaceModifyOperation.run(WorkspaceModifyOperation.jav
a:85)<br />