First here is a screen shot how to save take which will keep all changes.
Object must be save as tak if you want to keep changes ok.
And this is what help file says
Takes
Every object can be saves as a "take". Takes save all editing done on an object like object length, fade settings, and all object effects. MIDI takes save the instrument controlled by them (MIDI output or VST instrument).
Takes are saved as "TAK" (*.tak) files and take up virtually no space on the hard disk. So you can cut a sample, add various effects to it, and save it as various takes in order to use these together with all their editing in other MAGIX Music Maker 16 Premium arrangements.
The original sample will not be changed, only object and effect settings will be saved.
You can also save Synth objects as takes to create your own preset libraries for the synthesizer.
MAGIX Music Maker 16 Premium supplies many takes on content CDs.
Takes can be identified by their symbol in the Media Pool.
Warning! On loading the takes, the audio or video file, for which the take was added, must be in the original folder.
Make sure you didn't add any panning effects in the midi editor. This was driving me crazy until I figured out that setting the fade out via the midi was actually controlling the volume of the vst plugin. Hope this helps.
Did you not notice this thread is more than 9 years old? Please do not resurrect such old threads. The OP has not visited the forum since posting his question so I would guess he has now fully resolved the problem!