SanDisk Card Reader not working?

First time, i am trying to use a sandisk card for readyboost. But it only showed up once when downloading something like a update device driver or whatever. But it is not showing up. Any tips on getting it to work? I am currently googling the solution but so far no luck.

Nevermind. I got it to work. All i had to do is remove the program/driver from remove all programs in control panel. Then insert the sd card and restart the computer. Now it works

what was the program you deleted called?