Hi there,
In the Display properties, go in there and uncheck "extend my desktop to this monitor". Then you find the "TwinView" tab and set it to "clone". Then you will see the same thing on each monitor. If you run something in full screen on your monitor, it will be full screen on the TV. Let me know if it works.
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Icebox 3000™
AOpen HQ45 w/300watts
Soltek 75KAV-X w/snd
AMD T-bird 1GHz(133x7.5)
128MB PC100 @ 133
GF2 mx400 64MB AGP TVOUT
2.1GB hdd 
Delta 12x/40x DVD
56x CDROM
Windows 98
Turbo Gamer 21" Black Aluminum Case w/ 350watt Enermax Power Supply.
AMD Athlon XP 2500+ 1.83GHz @ 2.09GHz 1.65v (167*12.5)
ATi Radeon 8500LE 128MB DDR
Gigabyte GA-7VAXP KT400 w/sound+LAN+Firewire+RAID
2 x Samsung DDR SDRAM 256MB PC2700
Seagate Barracuda IV 80GB 7200rpm ATA-100
LiteOn Black CDWriter 42x24x42
LiteOn Black DVD-rom 16x
Panasonic Black 1.44MB 3.5"
Windows XP Professional
Creative Inspire 5200 5.1 Black Speakers
80mm LED Case Fans x 5
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