LSMW for WBS Master Data Change.

Dear Experts,

I want to create LSMW for CJ02 transaction, to update profit center and values for WBS elements a using single recording.

But the thing is when i m trying to update profit center and click on save, it is coming out of the transaction.

so i m not able to update the WBS elements for the project.

Can anybody help me out with this.

Thanks in advance.

Vineet