I had the same problem with xport360 when i got it and first started modding, i recommend downloading xplorer360 and using that instead thats what i did and havent had a problem with it.
I HAD THIS PROBLEM GO ON START BUTTON : CONTROL PANEL : USER ACCOUNT AND FAMILY SAFETY : USER ACCOUNTS : AT THE BOTTOM SHOULD SAY USER ACCOUNT CONTROL SETTINGS ? (UAC) CLICK THAT, EITHER TICK IT OR SLIDE THE BAR DOWN IF YOUR USING WINDOWS 7, RESTART COMP AND THEN U SHUD B ABLE TO DRAG AND DROP . INO THIS IS THE PROBLEM