Backup Exec 2012 - Linux

Hi,

All of my Windows servers are backing up fine but every time I try to back up a Linux server, I get the below error. I have increased virtual memory to 5GB and still get the message. Any hepl would be appreciated.

(Server: "BACKUP") (Job: "Linux-Full")  - -Full -- The job failed with the following error: A memory allocation request failed. The computer may be running low on virtual memory.