Bizarre color alterations

Alright, I've found a couple things here about this, but its not solving my problem as mine is a little different.
I have. Tiger, DVDSP 4.2.1
Designing a dvd with motion menus, etc.
Now. I have three files
Transition movie into first menu
first menu background movie
Transition OUT movie to next menu
All three were created in After effects, all using same files, same gamma, same settings. All imported into FCP, and all exported through compressor with identical settings as individual files
Now, ((( this is key )))) If I put all three on one track and play them next to each other, they flow seemlessly from one to the other with no color shifts.
However,
When I set it up as (track)*endjump to menu1* ----Menu1----(button to transitionOUT) I get a weird flash frame between the movies, and at the end of the transitionOUT, if I dont loop it or just go to the next menu, it indeed stops, and suddenly jumps up in gamma a good deal. If I loop it, great, but if I button away from it, again, I get a quick flash frame of the high gamma before it moves into the transitional movie.
Anyone help?
AB

Monika,
Thank you. Overprint preview didn't resolve the issue either. However, after seeing your comments about spot colors, I tried a couple of things that finally gave me the desired result. I had to go into the original logo file and convert all spot colors to process colors, turn "Global" off, then re-place the logo into the banner file. (I tried converting the colors in the banner file, but this did not make the desired change.)
SUCCESS! Thank you very much for your help on this!
Susan

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