How to recover from restoration data after I upgrade the memory?

> My laptop is Vista Home edition, the orignial memory is 2 Gb, after I
> upgade
> it to 3 Gb, when my laptop go to sleep and recover from the restoration
> data
> it will die and never recover ,after I remove 1 Gb Memory and start and
> delete restoration data and go to boot menu it will start and add 1 GB
> memory
> again, it can run in the 3 GB memory .
>
> If I shut down and start it will have no problem
>
> But How can I use 3GB memory and can use the restoration data or delete
> restoration data in some way and no need for me to physically remove the
> memory/
>
> Thanks.