I can't delete, format, mount nor see my extended partition in Ubuntu 11.10

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http://askubuntu.com – I have an extended 52-gigs partition that I can't seem to see from Linux, I can't mount it, delete it nor format it. How can I reclaim that drive back, I want the space. I manually installed my system from the live Ubuntu DVD. As I mentioned before, I'm using now a normal Ubuntu 11.10. This drive has been like this for a long time, but I've been very lazy to fix the problem when it happened. But now, I need the space. I tried to mount it, didn't work, tried to do something with it using some GUI apps, like Gparted and that disk utility tool that comes with Ubuntu, they didn't give me any opti (HowTos)