compatibility openphone with netmeeting

greeting….

i am using Internet Line Jack – quicknet. i had problem using gatekeeper.
configuration in our comp are :
A: win 2000, openphone, IP 192.168.1.11, netmeeting, gatekeeper 192.168.1.12, phone number 11111
B: debian 2.14.18, gatekeeper, IP 192.168.1.12 – 202.95.151.69, ohphone -lqa -u 22222
C: win XP, netmeeting, IP 192.168.1.22, gatekeeper 192.168.1.12, phone number 33333

1. every time i call WITHOUT registered gatekepeer (B) using openphone (netmeeting off) from A to C, it says “Incoming call from 192.168.1.11 “. when i accept, nothing happen. it is still not in call
2 every time i call WITH registered gatekepeer (B) from A to C, it says “could not find user 192.168.1.22”
3. every time i call WITH registered gatekepeer (B) using netmeeting (openphone off) from A to C, it says “Incoming call from 192.168.1.11 “. when i accept, i can talk each other.

Question:
a. does openphone compatible with netmeeting?
b. can gatekeeper operate as terminal using ohphone or gnomemmeeting. ..? i never succedd with this configuration.

thanx,
bexti