iMac 27" late 2009 model won't read Windows 7 Home Premium DVD.

Hello everyone,

I am trying to Partition my Hardrive and install Windows 7.

Unlike the guides on youtube in order to partition the Hard drive windows 7 has to be installed i.e. the 'Partition' button in Bootcamp is replaced with 'Install'.

My OS is MountainLion, Bootcamp is up-to-date version 5.0.1.

I put my Fightclub DVD and it read fine, the Windows 7 Home Premium DVD however doesn't even appear in Finder.

Any suggestions are welcomed and greatly appreciated.