PS NOT REMOVING BACKGROUND

Unfortunately you haven't given us detailed informations about your issue and any information about your system. Therefore, all proposed solutions are a look into the crystal ball

Which operation system and which Photoshop version do you use?

Maybe you can post your Photoshop system info. In Photoshop goto Help > System Info and hit the copy button. Then paste the entire informations into this thread

What you're trying exactly to do?

What happened and which result did you expect?

A screenshot (if possible) you be helpful.