[Koha] SIP v1.00 to v2.00

hi friends, When i send command 63,17 etc on Sip cilent to sip Server.i get connection closed message. syslog file shown protocol v.1 is skipped this command. I use koha 3.00.02 on Ubuntu 9.04. so how to update v1 into v2 . Please reply me! Thank You Regarding, Ankita