when itry any of your demos they get a message saying it wont work

how to fix?

Do you have a mac? I you do, that’s why. It don’t work for macs.

Um, that tells us absolutely nothing. Unless we know what the error says, we can’t help you… there could be a million things that interfere. Broken or incompatible sound cards prevent it from working. Incompatible OS’s stop it from working. Corrupt download managers could stop it from working. Lacking DLLs could stop it from working. Hell, maybe a virus could even stop it from working… Etc, etc, etc.