Mush. Valley My "A" works Enter button don't can't jump help

[truckermanswife]

I can change my party members but where Brain was talking about I can't jump there. I hit the enter button on a few walls sticking out and my Enter button seems disabled. Plz help. Where are u suppose to be able to jump at? Thanks in Advance.

EDIT Power of posting figured it out thanks. Was into fight with the Lamia witch. Was her valley tis no more