GRUB load error

view full story

http://askubuntu.com – When I try installing Ubuntu from the Try Ubuntu off of my usb I get the error "executing 'grub-install/dev/sdb' failed". I had PCLinuxOS installed and I was attempting to fully replace it with Ubuntu 12.04 I've seen a lot of other questions similar to this but as far as I've been able to figure out none of the solutions work for me. when I run sudo fdisk -l in the terminal it shows that dev/sda1 is linux, dev/sda2 is extended, and div/sda5 is Linux swap/ Solaris then there is a dev/sdb1 that is FAT16 Sorry I couldn't figure out how to insert a screen shot but if needed and you can explain (HowTos)