Does it work correctly if you call the CC number directly? If not, what, if anything, shows in CC's call history? In OBi's?
If calls direct to the CC number are ok, confirm that GV is set up to
not forward to Google Chat and
is set up to forward to the CC number. If it still doesn't work, check CC and OBi history for the GV case.
If you are getting the number but not the name, see
http://www.obitalk.com/forum/index.php?topic=3024.80