like I have explained earlier...i think...There are # reason of why there is lag.
1.) I have to many programs running, which I don't, I have my runserver.bat open, an auto-reastarter, the occasional internet explorer/mozilla firefox, and aim. 4 programs max.
2.) You have to many programs open, which , like you said, you dont.
3.)Depending on where you are, you might be experiencing some lag from your ISP
4.) The usual connection screw-up because I AM USING WIRELESS INTERNET. SOMETIMES CONNECTIONS CAN INTERFERE. There is nothing else I can do about lag.