Cannot create entry/exit from runway

I have a strange problem. I cannot connect the taxi node to the runway, it sais no taxi way foundation. And still I have a very broad taxi way connected to the end of the runway. But I cannot drag the taxinodes over the runway to connect with the runway node. The nodes become red and the runway entries and exits cannot be made. What did I do wrong?

A: I would put this onto support
B: next to runways is the runway exit and entry (in build menu)

Yeah, stupid, did not play the game for a while, should have seen that. Thanks man!

Np! Happy to help