NoClassDefFoundError: WordprocessingMLPackage.load()

Hi,
this is my problem:

Uploaded with ImageShack.us
Using java 1.6 and Eclipse helios
The Exception is thrown at line 30 (.load()) but why
this is my problem:

Uploaded with ImageShack.us
Using java 1.6 and Eclipse helios
The Exception is thrown at line 30 (.load()) but why
