Wiki Error?

Hi, I am reading the OpenBSC_GPRS wiki page and trying to get GPRS up and running. On the wiki it says: ! ! Osmocom SGSN configuration ! ! line vty no login ! sgsn gtp local-ip 192.168.1.128 ggsn 0 remote-ip 192.168.1.129 ggsn 0 gtp-version 1 ! ns timer tns-block 3 timer tns-block-retries 3 timer tns-reset 3 timer tns-reset-retries 3 timer tns-test 30 timer tns-alive 3 timer tns-alive-retries 10 encapsulation udp local-ip 192.168.0.128 encapsulation udp local-port 23000 encapsulation framerelay-gre enabled 0 ! bssgp ! Shouldn't encapsulation udp local-ip and gtp local-ip be the same if everything is on the same subnet? Also I have all 3 processes running openggsn, osmo-sgsn and bsc_hack but GPRS does not attach on any of my handsets. What could be the problem?