Hibernation Problems

[codenamevirus]

Hi

I have a Acer Aspire 1640 customised notebook. It has Inter Pentium M Processor 1.73 Ghz, 2 GB ram. I think the motherboard is from the intel 915 mobile family.

It has Windows XP SP2 installed on it. The problem is when I try to hibernate, sometimes what happens is, the window saying preparing to hibernate comes, next the hibernating screen comes and then suddenly the windows desktop comes back with a warning "Insufficient memory to complete the API".

When this happens, the hibernate option from the shutdown menu is not present anymore, and i hav to shutdown or restart the machine!!

And this thing happens only when 2-3 applications are open....like if i hav a internet explorer window, ms word doc with msn n yahoo messenger signed in.

Whats the problem, why is it showin that way? My windows partition has 2 gb of empty space still left, apart from the hibernation space already reserved.

How to cure this one?