How come AE cannot interpret Alpha Channel from ProRes4444 ?

Hi there,
I exported a video clip using Final Cut Pro X with alpha channel using the ProRes4444 codec.
I have tested his alpha channel works & it works in FInal Cut Pro X when I import it back to Final Cut Pro X to test it.
However, when I bring this file to After Effects CS5, it cannot recognize the alpha channel because the transparent part are all in solid black.
How do I make AE interpret the ProRes4444 file as transparent with alpha channel ?
Thanks

Rick Gerard wrote:
ryan_khoo wrote:
Q1. But how do I check the file interpretation in AE ?
Q2. I am using AE CS5. Is it bcos you are using AE CS5.5 that you never have problem with ProRes4444 ?
Q1. This is part of the basics. Select the file you want to interpret in the Project Panel then either right click or go to the menu File>Interpret Footage>Main or use the keyboard shortcut Alt/Option + Ctrl/Cmnd + G
Q2. Nope... It's always worked. There were some gamma problems for a while, and a few other bugs here and there with ProRez, but if you're Mac is up to date you should have no problems with the alpha channel.
Thanks Rick for your help, I really appreciate it as I am not quite familiar with AE.
Q1. I did the steps you taught me & a new screen pop out. But under the "Main Options" tab, the section under Alpha, there are 4 choices (Ignore, Straight-Unmatted, Premutliplied-Matted with color, Invert Alpha). But all these was all greyed out. Any idea why ?
Q2. I am using Mac & I just checked my AE CS5 is Version 10.0. I am a student and i bought the Student Edition. Student Edition not allowed to update, right ?
Thanks

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