Bug#447133: Reregistering doesn't seem to work

[joerg.twinklephone at gmx.de]

When you reregister with your ISP, you most likely get a new IP address for 
your PC. This new IP doesn't match the IP twinkle shows in window title -> no 
more SIP.
You might use DynDNS and provision this URL for "fixed IP" in twinkles NAT 
settings.
Also STUN might help.
Restarting twinkle so it will read the new IP surely helps.

cheers
jOERG