Windows 7 - usb ps2 stopped working after installing nidia 8600gt

hi everyone i have searched high and low for a solution and im about to give up
i have a problem with my usb and ps2 ports they stopped working after i installed a pcie nvdia 8600gt card but my 2 front usbs work fine the 4 at back dont also nor do my ps2 ports

the funny thing is when i remove the the nvidia graphics card my ports start to work again i have tryed a fresh install still nothing according to device manager my usb ports are working but when i plug something in theres nothing even when i have my ps2 mouse n keyboard plugged in at boot up there isint even a hint of power there is no exclamation marks in device manger either

my motherboard is a ECS Geforce7050m-m vers2.0 2 gigs of ram a dualcore amd+2 7850 black edition processor 500 gig harddrive

my only option would to be take out my nvidia card and use the onboard graphics card using just the onboard card which is ok but not good for games i play games all the time what does everyone think

any help would be appreciated

kind regards

jay

its ok folks i forgot to mention it was a new pc i built and i discovered that it was because the motherboard wasent quite sitting right and was shorting out all fixed now