Not sure exactly what problem you're having.

I have the Thule 450R Rapid Crossroad rack attachment (it has the track in it). Also the Thule RB53 Rapid load bars. Works perfectly.

They are not mounted right now so I can't send you a picture of that but I'm sure you could find the two parts on Thule's site.

Looking at your email again, maybe you have the BMW Aero T-Track (not sure what that is) and you trying to attach a Thule load bar or ski/snowboard/bike rack to it?