IDEA problem

I am currently evaluating visual paradigm, and i’m using it with intellij IDEA. My problem is, when i add a new field to a class in visual paradigm and syncronize with IDEA, everything goes fine and new field is added. However, when i delete that field, it’s not deleted from java file in IDEA.
Any ideas about what may be wrong ??
Thanks in advance

I have tested the SDE-IJ with your steps. Everything go fine, would you mind telling me which SDE or VP-UML and IDEA version are you using? And please attach the vp.log file in you IDEA_HOME\bin directory to me. Thx.