Unhappy [Q] galaxy tab gt-p7500 stuck with no OS

im having some trouble installing a new OS on my gt-p7500 after wiping everyting. i have TWRP installed but im trying to find a way to push my new rom onto it. when i connect it to my windows 7 based laptop it says that the drivers where not installed. ive installed samsung drivers several times but it keeps saying the same damn thing :/ odin recognizes the device but kies cant connect... any ideas?