My mac wont start up. please help

hi, i wanted to reinstall osx panter as my computer was running really slow. I put the disc in ad my mac restarted. It now wont start upat all. i've tried holding down shfit and c abd still nothing happns.I can not get the disc out as i have a mac mini and the eject button on the key board isnt working. Do you know what ii can do? When I press the power butten the apple logo comes up as normal but then nothing happens

To eject the CD, depress the mouse button at startup.
To boot from a CD, you depress/hold the "c" key at startup.
Look at these links.
The X Lab (Troubleshooting & Maintenance of OS X)
http://www.thexlab.com/faqs/faqs.html
Apple's Mac OS X Troubleshooting 101
http://www.apple.com/support/mac101/help/
OS X Routine Maintenance & Generic Troubleshooting
http://www.macattorney.com/ts.html
Prevent Mac Disasters
http://www.macworld.com/2005/01/features/preventmacdisasters/index.php
 Cheers, Tom

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