Hi I changed the RAM heatsinks on my videocard and they wont stay on, they keep falling off, I did everything that says on the instructions, I clean both the ram's surface and the heatsink surface, since that did not work I tried with some thermal tape I bought, same thing, every heatsink keeps on falling. Does anyone knows of a good thermal tape to use, the heatsinks that I used are the Iceberq copper.