A little help please

Hi,guys,I have a litlle problem with my OS,(Windows 7 ultimate 32 bit)
After I've added a modul of 1GB of RAM to my system,my computer start crashing,when I was browsing the internet.
On Vista I don't havethose problems,but I'll like to return to Windows 7.
My system is:
AMD Athlon 64x2
ATI Radeon 2400 HD pci-e
2GB RAM DDR2
160GB HDD
CPU 2,3 GHz
Please help me to fix this problem.
Thanks.

richc46 said:

Make sure that the ram is the same as the other stick. Not good to mix and match

Test MB the slot.

That ******* told me is the same RAM.
On Vista I don't have those problems,
do you think,If I install a windows 7 home premium my problems will disaper?
Thanks.

whs said:

I doubt that it has something to do with the Windoes7 edition. Do I understand that Win7 ran before you added the new stick?
One thing you should do is check in the Event Viewer whether any serious problems are reported-
Start > Right click on Computer > Manage > Event Viewer

My windows 7 ran great befor I've added the new RAM.
I'm using Vista right now,and I do't have any problems.
Thanks.

richc46 said:

To be honest, I do not think that the edition of 7 will matter in this situation.

So,what you sugest to do?

richc46 said:

I would make sure that the ram sticks are compatible.

Allready done that. no problem.
the temperature of my system is ok,nothing seems to be wrong.
I have this problem,only when I'm surfing the internet.