Logic Pro 9 varispeed problem

#1
Today I tried to change the tempo of a project with varispeed from 100 to 92. Even if I use the option only speed the audio files are transposed. There is no difference between only speed and varispeed.
I´m using a PM G5 with Logic 9.0.2. If I open the song with my first generation Macbook (Core Duo 1,83) the only speed mode seems to work.
I get the song from an friend who is also using a PM G5. There the only speed mode is working.
Tried to open songs which are created on my system and there is the same problem.
Thanks Uwe
 
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