ASA 5540 high memory utilizationits stuck at 79% no major changes done to the config

Primary ASA 5540 from 10/08/2009went up memory utilization from 600mb to 800mb out of 1GB total memeoryNo matter what time of the day - its stuckI disabled logging and other couple memory related twiks but does not helpI don't want to reboot until i ...

DID call to extn is going to VM ?Internal works fineAll the call forwarding options under the line extn are taken out ..Does not help ??Any clue