connecting plasma to tv?

[t-maxxracer32]

hey guys ive wanted to be able to connect my new plasma to my computer for a while but never got around to it.

today i went to best buy and bought a dmi-d cable that had an hdmi cable on the end of it..

i figured itd be an easy install (just connect everything...)
but it didnt work

when connected my tv does recognize something but it sais
"not supproted mode"

what does this mean?

what i did was hookup the hdmi cable to input 1 on my tv. then put the dmi cable onto the place where my existing pc monitor was hooked up to.


am i supposed to put the dmi cable onto my pc monitor? so id have 2 things going at once? or do i change the setting on my computer?

or am i supposed to get a vga cable????? so freakin annoyed!

thanks for any help