Thank you Haddas, But this does not work. I tried also &net.sip.tcp.reuse=false without success. I think that both these patterns are for requests from Brekeke. My issue is when the initial request (INVITE) comes from Brekeke. And then my application wants to sent a new request (BYE) in the opposite ...

1. Brekeke Product Name and version: Brekeke SIP Server , Version 2.4.8.6 Evaluation 2. Java version: 5 3. OS type and the version: Windows XP 4. UA (phone), gateway or other hardware/software involved: 5. Select your network pattern from http://www.brekeke-sip.com/bbs/network/networkpatterns.html ...