unable to delete selection[SOLVED]

I need to delete a selection of audio. I make the selection, press delete, nothing happens. I go to the edit menu, delete is greyed out. I press the fill with silence button and nothing happens. Wtf. I wouldn’t think something as simple as deleting a selection would cause a problem. Pease help, thanks.

Please try http://manual.audacityteam.org/o/man/faq_editing.html#grayed



Thank you XD