asterisk users - Oct 2005 - getting called number from a zap channel

Hello,

i've got the following setup:

exten => _X.,1,Dial(Zap/${EXTEN},15,T)

exten => 9000,1,AGI(agi://localhost/myagi.agi);

Now i want to do the follwing. With the catchall extension i make an 
outbound call to another person. This Person will then get transfered to 
extension 9000 and will be connected to the AGI-Script. So far this 
works fine. But the AGI Script has to know with whom it is connected so 
i want to know the number of the called person.
In a setup with CAPI i was able to get the Number from the DNID 
Variable, but with a Zap-Channel with Variable is empty :(

Actually i am running a rather outdated 1.0.2 version of asterisk. I 
have tried out 1.0.8 with the same result. Is it possible to give 1.2 a 
try without having to change the whole config??

tobias