Need help with * as VM/Auto attendant only

I’m trying to get * to work as an auto attendant and voice mail to interface with our panasonic dbs. For testing, I have * 1.6.09 running with a digium tdm400p and two fxo modules. A call comes in and says something like press 1 for purchasing (ivr) and routes the call to extension 421. 421 needs to dial 94211 on the other fxo module to get the call to the extension on the panasonic system. Then if the call isn’t answered in 10 seconds it needs to revert back to the * vm box. I couldn’t see what I needed to do other than dial 94211 at least initial just to get the panasonic ext to ring. But when I do this * hangs up right away. All I had was…

exten => 421,1,Dial(94211,10)

It never dials and the panasonic ext never rings.

– Executing [421@from-did-direct:1] Dial(“DAHDI/2-1”, “94211,10”) in new stack
== Spawn extension (from-did-direct, 421, 1) exited non-zero on ‘DAHDI/2-1’
– Hungup ‘DAHDI/2-1’

Thanks for any tips!