Hi guys, 

I have Ubuntu 11.04 and i'm having trouble with my USB and External not mounting automatically. I'm a bit of a Linux noob so bear with me. 

When i plug in my USB i see it in Disk Utility but it doesn't mount.

I followed this guide.

https://help.ubuntu.com/community/Mount/USB


My auto mount settings are fine but it doesn't mount. I get this error


Error mounting: mount exited with exit code 1: helper failed with:
mount: according to mtab, /dev/sda1 is already mounted on /
mount failed
 
 I normally mount manually which is annoying.

I assume that it is trying to mount my USB where my internal hard drive is already mounted.

Any help would be much appreciated.