Ok, found the issue, as I have written in a post earlier, you have a different output gamma than the default max2014. You can't access it without script so I guess you're using an old maxstart.max file where the old gamma setting is still in there.
Default Output gamma is 2.2 in max 2014. Yours was at 1.0
You can test it by typing this into your maxscript listener (the pink field in the bottom left corner)
fileOutGamma