Cisco 7960 issue

i have asterisk and 2 cisco 7960, cisco 7905, the asterisk connected to 2 phone lines via 2 FXO ports, the incoming calls working perfect i get the voice menu then i choose the extension number. when i try to dial from the 7960 to the outside i get a busy sound, i check with a sniffer and got error 404 from the asterisk, does anyone familiar with that issue.
the other 7905 phones works perfect inside and outside.

I downgraded the firmware to ver.6
and now i get ERROR 401 UNAUTHORIZED

any idea???

I downgraded the firmware to ver.6
and now i get ERROR 401 UNAUTHORIZED

any idea???

I downgraded the firmware to ver.6
and now i get ERROR 401 UNAUTHORIZED

any idea???