Cisco 7970 SIP upgrade ver. 8.5.4 problem

Hi everyone,

I’ve problem with upgrading Cisco 7970 to SIP 8.5.4.
I’ve few phones and one was upgreded with success. But when I want to do it on others phones its not possible. Its strange becouse thouse phones are upgrading to SIP 8.0.3 without any problems.

Anyone knows what might be the problem I cant make them work with 8.5.4?

Maybe there is any better SIP version than 8.5.4 which work great with Asterisk ?

Please help.