Ok, try this. First, you need to have the sg3-utils installed. You don't mention which distro you're using, so you'll have to find out how to install it yourself.
Then you can use the command sg_scan -i to find the scsi device number of your device, probably sg0, but if you have more than one scsi/usb device plugged in it may be something else. Then, run sg_map to find out what the actual mount point will be. sg0 will probably map to sda, sg1 to sdb, etc.
Finally, once you know all that, you can mount the device using that mount point. Be sure to try both sd* and sd*1.
If it still doesn't work, then you might have something wrong with your usb setup.
I got it all from this page: