Page link not working in stacks (with Xpress) ?

Hi, I'm using the new Stacks function in the last update of AppStudio for XPress. My problem is that It seems that I can't make a link from a button on page one of the stack to another page in the same stack in the same section (it works only with the first page of a stack, not page 2, or 3 or more getting "down" the stack). Maybe i'm doing wrong, maybe is this a bug? Thanks for your help (and sorry for my english)! Frédéric