No, there is no problem with the score editor, I've checked all of them. But I think I have finally found the reason. It was an issue with the outputs of VE PRO which apparently were not activated, by activating all of them, even those that I don't need, it did the trick. I also changed the location of VE PRO which was under OUT 1/2 and above OUT 3/4, OUT 5/6, etc...and put it above OUT 1/2.