can't load the office 2008 DVD

A

Astroman1386

Version: 2008
Operating System: Mac OS X 10.5 (Leopard)
Processor: intel

I have MAC Pro & Mac Book Pro

when i put a office 2008 disc to MAC PRO, DVD no respond, other disc is work fine

But no problem on Mac Book Pro.

WHY? please help
 
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