BDT - save changes when go back

hi all.

i'm using BDT for GM(Grant Management).

it's working the same as in BP BDT.

when i push 'BACK' button i got a poput alerts me to save

or cancel changes.

i chose 'save' option , but i found out that no changes are saved , both for sap tabs and for customer tabs.

i think the problem occurs from the bdt_customize at events option - event 'XCHNG'.

is the order of th function modules important?

if anyone can help me with this issue i will be very

thankfull.