Hey dear community, I'm here to want help from you.I don't know here is the right section of the problem, if not ; sorry for that. 
The point goes here,my FPS damnly got down.It was always at the FPS limit of the server which I'm playing on.I found something on other forums,then I changed my display to win98.It increased my FPS a lot,but now even with that it's so little. 
It's around 20-30 in a server which has 51 FPS limit.And about the resolution,even with 640x600x16,it's still around 20-30. 
You might think like my pc ain't enough for them,but it is. 
-Windows 7 Home Premium. 
-NVIDIA GeForce GT220M cuda, 1GB. 
-4GB RAM. 
-500 GB HARD DISK. 
-Intel Centrino 2 inside. 
Well,I didn't reboot it since I bought the pc,like it's been over 1 year.I need help,I have to play it. 
Suggesting for a booster won't be useful,all of them ain't working/increasing my FPS. 
Thanks for upcoming suggestions,Hellyeah.