GKAuth::VoIP Call management

hello
i fix the problem ....

the only issue whta i have open is the folowing

i run perl billing.pl i get connected to gk.. i recive cdr..but when a user with a prepaid account is finishing his credid he is not disconect..he is allow to finis the call whenerwer he whants and the credit is runing down on minus ex -7 and is not stopping on 0...

the script is sending the command to the gk to disconect the call but the gk is not taking action....
i dint fiing any command in gkmanual for this future but when i use gkgui..and i make disconect call, the call is disconected.

could u help me with this? so i can finish what i promise ( the freebsd instalation )

Regards Cristian