VPN CONFERENCE issue

[nestorq]

I have ASA 5510, CUCM9.1, GW 2911 with FXO

when i try to connect to meetme  conference works for no more than 1 minute (in VPN), after that i dont have a ping to the gw 2911 and the ip comunicator is down from the VPN client but the VPN still UP,

im not sure if i need disable something in the ASA?

any body can help

[George Thomas]

I would disable Skinny inspection on the ASA. 

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[nestorq]

I disable the skinny and when i made the call works.. but when i did other calls my VPN lost connection with the gateway but the VPN still connected.. any body ahs another idea?

calls between SIP works perfect, is between GW with FXO  fom CUCM..