Only root can mount, why?

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http://askubuntu.com – I am dual booting Ubuntu 12.04 and Windows 7. I looked at my /etc/fstab yesterday and realized it did not contain my Windows 7 partition. So I added it myself, but now it tells me it cannot mount the partition. My /etc/fstab now looks like this: # <file system> <mount point> <type> <options> <dump> <pass> proc /proc proc nodev,noexec,nosuid 0 0 # Ubuntu /dev/sda6 UUID=581c89aa-d71c-460c-96c0-04f188fe862a / ext4 errors=remount-ro 0 1 # swap /dev/sda5 UUID=99b951b9-1a57-43ee-938e-fe31b1ba754f none (HowTos)