It's an odd situation.
The fact that the 360 sees it when plugged up to USB proves that the hard drive is good (powers on, formatted correctly, etc.)
The fact that the other harddrive works when plugged directly into the 360 proves that the xbox's connector is fine.
Perhaps the connector on the 60gb hard drive is slightly out of place, or the case is cracked/broken somewhere preventing a good connection on the 360 but not the usb cable? Try turning on the 360 while pressing on the hd above the connector.
Thanks for the reply
I tryed but unfortunatly it didnt work, Anything else i can try?