My navigation link isn't connecting OutSystems

I'm trying to link my web pages and the navigation isn't working. I've set the destination as my Rosters Page. Outsystems seems to even tell me what data type I need but when I put that into the expression editor it gives me the below message. I think I may have set the structure up wrong. I just can't understand why I can't input the TeamID attribute in to retrieve my Rosters page on the next screen. I mean, TeamID is even an attribute on the Rosters table itself. So why does it not seem to link?

From the print screen I can see that the TeamRosters page input is probably a structure. You should change it to be a LongInteger, as far as I can understand from the screen.