Can't not run TestChoser for jME Physics

I follow the guide and had successfully build jME and jME Physics  on Netbeans 6.0 Beta 2. I can run TestChoser on jME just fine, but when i try TestChoser for jME Physics i got this error:

java.lang.NoClassDefFoundError: and
Exception in thread "main"
Java Result: 1
BUILD SUCCESSFUL (total time: 0 seconds)

I've double checked the guide, but I couldn't see what gone wrong. Can anyone help?

Sorry for posting at the wrong place. Please remove this thread  :smiley: