usb 2 port problem

i recenlty reinstalled my pc with windows xp and updated it using windows update to sp2. now wen i connect my pen drive to the hi speed port which used to work well before reinstalling now gives me the msg that hi-speeed device will work faster if connected to hi-speed port and that no hi-speed host controller installed on this comp. wat to do now?

 

mine is intel p4 bought in 2005. yes i installed all drivers using the driver cd. and in device manager under usb there three usb host controllers and 3 usb root hub written then there is other heading called other devices under which is written usb controller but the icon for it is question mark.

my friend told that mine is mostly only usb1.1 but i wasnt seeing this msg before.