Yeap that may be a prob. I have the same scoops but you must wipe off all wax and residue from the two sides that the tape will be making contact with. If you just wash it with water and soap that is not good enough. Get some Dawn soap to clean it first then wipe it with rubbing alcohol or similar product. I have had mine on for 6 years and it has not moved.
http://www.mustangboards.com/mustang...500/ppuser/102