virtual memory error

I keep getting an occasional virtual memory error on my CF 4.5.1 sp 2 with Win 2K. Today it happened during the workday for the first time. We have 512 mg ram (Monday it will be 1 gig). I use a few CFX tags, cfx_ping, cfx_domainuser, cfx_filereadlines,cfx_zip (I just made sure that all were

virtual memory error, CF, and the infinite loop

I've gone through the archives and realize that this issue has been talked about. I would just like to further input if anyone has some. We've got a PIII 500 Win2k CFPro 4.5.1 box with 512MB RAM running. Up until the last two weeks or so, we have had no problems with this machine. However, we'v