Problem using Quicktime with SL...

Has anyone seen a question mark using Quicktime?

I have recently purchased a 21.5" iMac w/ATI GPU for my work computer, and I am trying to play an avi file in Quicktime. The file is coming from the Windows program 3D Max, and has an avi file which has worked on all my Macs except for my new iMac that is running Snow Leopard.

Does anyone know if this a Snow Leopard issue or Codec problem? I have already downloaded Perian, but have had no luck in fixing my problem.

Has anyone else experienced the '?' covering the Quicktime icon like I show in the attached pic?

Any help would be much appreciated...

 

Flip4Mac didn't do it - I have tried it already. I have VLC as well as Perian too, and it still isn't doing the trick...

Could SL be the problem?

 

Is anyone experiencing the same thing, or ever seen this now infamous '?' when using Quicktime?

I initially thought this was a codec issue, but I am totally lost... maybe this is because of SL