Mass Changes to custom fields of WBS element through CNMASS

Hi ,

I have Added one custom field using screen exit CNEX0007 in CJ20N T-code.

Now i nedd to change / update this custom field using Mass change option (CNMASS).

While doing mass change of WBS element through tcode CNMASS , changes for custom fields are not recognised / updated in table PRPS.

We have a custom field called APPROVER ( ZZAPPROVER ) which is appended to PRPS table using CI_PRPS structure and also added in the following structures using ( APPEND STRUCTURE )

CNMASS_WBS_ELEMENT

BAPI_WBS_ELEMENT_UPDATE and BAPI_WBS_ELEMENT_EXP .

But when i try to update this custom field through CNMASS , changes are not updated in table PRPS. but i am getting sucess Message as Changes has been don successfully.

Any idea how to achieve mass change of custon field would be highly appreciated.

Thanks in advance.