Pen drive not recognised by Mac

Hi,
Recently I have bought a 8GB Transcend Jet V30 Pen drive which was pre-formatted in FAT32 file system. The pen drive is working fine with PC(winXP) but not at all recognsied by MAC though the pen drive is getting power from USB port. We have 5 Mac Pro at office, I tried with each of them but no luck though there is no problem in working with PC.
I've re-formatted the drive several times in FAT32 format with the help of different formatting tool but no joy.I've checked 'Disk Utility' in MAC but no mention of the pen drive there. There is no icon getting generated on the desktop.
I have a couple of 2GB pen drives of same make which work fine with mac and PC both.Please help me, pen drive appearing to be pain drive for me.
Thanking all,
emrck

I've re-formatted the drive several times in FAT32 format with the help of different formatting tool
Since the Mac is not seeing the drive, I assume you did the formatting on a PC - correct? You might try this. Erase the drive on the PC & then plug into the Mac. Will Disk Utility see it? If so, format FAT32 with Disk Utility.
Here's a couple of formatting instructions.
http://www.ehow.com/how2006214format-flash-drive.html
http://www.brighthub.com/computing/mac-platform/articles/54716.aspx
 Cheers, Tom

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