Running SLES11 sp3 with OES11 sp2.

DHCP and most of DNS are working correctly, in that IP's and other details are pushed to the work station via DHCP. I can then ping the PC and the PC can resolve various DNS entries like servers. When using other application like SolarWinds etc the name resolution does not work 100 % correctly. The issue seems to be that the IN-ADDR-ARPA zone does not get updated automatically. By manually adding the IP address to this zone fixes the problem. How can I make this update to the IN-ADDR-ARPA zone automatic.

Any ideas on how to fix this will be appreciated.