Nokia IP1220 Memory leak Issue

am running a Checkpoint Firewall on a Nokia IP1220 Box in an Enterprise Environment. The memory utlization gradually keeps on increasing till it reaches almost 100%. I am being forced to reboot the box every 15 days.

The Box details is as below.

Model: IP1220
S/w Release: 4.1 Build 035
S/W Version: releng1515 09.24.2007 - 211317
Physical Memory 1024 MB
Current Memory Utilization:900MB

F/W Version: VPN-1 & Firewall - 1 (R) NG with Application Intelligence (R55) HFA_09 for IPSO 3.8;Hotfix 976 - Build 003

Any possible help to resolve this issue would be highly appreciated.

regards,

Kalpesh Mehta