Guys 'n' Gals

A month or so ago I tried to plug my falsh drive(bought in popvoucher)into my MAC to send some photos. The USB said it was being charged but the MAC seems to have no linking that it's connected. I can't force it to pick it up when it can't see anything there at all. I've not been able to connect it to the MAC since

Can anyone suggest what might (not) be happening?

The Sandisk Cruzer Micro 4Gb Flash Pen that you linked to is not compatible with a Mac
Details Here

o,thanks a lot,maybe I should try another USB driver.

According to the link I provided, it comes loaded with software and is formated for a PC not a Mac. As long as it is formatted for a PC it will not work in a Mac. Just like you can't take a game made for Windows and run it on a Mac