Really annoying backwards compatibility problem

So I just downloaded the first Halo and whenever I try to play the game an error comes up that says "The game could not start, please download it again." And so I downloaded it again and it still didn't work. Also I used to be able to play Xbox original games that used a disc on my 360 before i got the single red light that means something isn't plugged in right and it was my HDD. Then after I fixed that I could play any Xbox original game any more. Anybody know how to fix this or if there is even a possibility of me fixing it?

Thank you in advance.

put the disc in again

Are you using an official Hard Drive that came with the 360? A quick Google search of your error message revealed that the partition for your hard drive that handles the backwards compatibility for original Xbox games may be missing. This could happen if you bought a 3rd party Hard Drive or bought a real-looking fake one off of eBay or something.

the biggest flaw ive found with the 360 bc compatiability!! was every game i played only worked in 4:3 no widescreen support but they worked in widescreen on the original xbox. man i hate big black bars on the sides of my tv!

the biggest flaw ive found with the 360 bc compatiability!! was every game i played only worked in 4:3 no widescreen support but they worked in widescreen on the original xbox. man i hate big black bars on the sides of my tv!

atc-fanatic