PIX Firewall Memory Allocation Error

I having problem with PIX Firewall memory, it show "memory allocation error" i using cisco pix 515E with os 6.3.....

does it the memory problem or .....? :

Hi,

First of all what is the memory of your PIX and License


License Before After

Restricted 32 MB 64 MB
Unrestricted 64 MB 128 MB
Failover 64 MB 128 MB