How much RAM do you have?
For the virtual memory > Start > Control Panel > System > Advanced > Settings (first one) > Advanced > Change > Select "system managed size" and then click set. Now click ok and restart your computer.
If you want you can add your min and max vlaues. Do this by selecting "Custom size" For initial size i have 768 and max i have 1536. Works perfectly...
I have 512MB RAM.