PC doesn't recognise R4SDHC while Nintendo DS does

Hi,
I'm new on this forum. Recently purchased a set of Micro SD 2GB + USB Holder for it + Nintendo DS holder (cardridge).
The Nintendo DS console recognises the R4 SDHC Cardridge, but my PC doesn't, making it impossible to drag stuff from my PC to the DS.

When checking all my drives on the PC (C/D/E..) it doesn't show any additional capacity...

Please help this Belgian fellow (and his little son).

ive just ordered a r4 and sd and all the stuff you ordered im a bit of a pc nerd so when it gets here im almost sure ill be able to help you hope i can

My guess would be it's either your Micro SD - USB adapter or your USB port that's giving you trouble.

Try a different USB port on your computer. See if that helps.

Also, what version of the adapter do you have? Is it the transparent plastic one? That one should light up when plugged into the computer. If it's not lighting up, it might be busted.