Do you guys have a ping count in the arena's list for the AVA / and others ? 
When my router gets reset or my subnet,ip changes I get the same problem no transmit vox, udp/tcp switch , no arena ping with packet loss, and I always get booted .  
Set my ports to allow Aces high 2000-6000 for my pc and voila .    you may have to set the arena ip's for your firewall ect . remember its 3 different ip's now . 
Hope that helps <S>