Question about late 2012 iMac and After Effects

I love my new Imac 27 and it has been flawless on almost everything. But today I ran into a strange problem with After Effects. This was the first time using AE on the new machine. CS3 had been activated a while back and photoshop and others are working just fine. When I put an mp3 file into a composition and try to preview the sound comes back an octave or two lower than it should be. Weird. I tried the same file in an older imac with AE and it worked just fine. Could it be a setting somewhere that I have missed?

Any help will be most appreciated!

Tom

simsaladimbamba said:

Tried it with an uncompressed WAV or AIFF of that MP3 yet?

Click to expand...

Thanks for this. I saved the file as an .aif and now when I try and preview the audio file it hangs. When I try to preview an mp4 it goes very quickly through it, like about 5x as fast from normal speed.

This is all very odd since I used AE on this computer a while back but before I activated my CS3. The activation option seems to be greyed out in the help menu. When I try to register it says no connection to the internet. Could it be due to not having registered? This is nuts.