Help: Connecting my mobile memory card to my pc

I got one big problem regarding my Nokia 6131 and that is when i have to connect my SD memory card to my pc. I have a usb 2.0 hub, and i put the adapter + memory card in a memory card reader which in its turn is attached to the usb (pc --> usb --> memory card reader --> adapter + hub).

The problem comes when i try to open Removable Disk F: when the Insert Disk pops up telling me to insert a disk inside my pc. What am i doing wrong?. I would be really pleased if some1 helps me. Thanks in advance.

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IMO,maybe
1.hardware problems
Make sure none of yr adapter + memory card or memory card reader was spoiled.
Just test them in another computer,ok?
2.software
Have you had install the driver of the USB ?
Or make sure your computer had not infected the virus!
Tell me the outcome!

currently i got it to the shop where i bought it from just to check if something is wrong

Do you have a pin on the memory card? If you do it just wont be read by the card reader.