How to define a RWALL

Dear user and support,

I made a simpel system in OptiStruct: A RWALL which has a certain velocity is moving towards a pipe. My problem is that the RWALL is moving through the Pipe and doesn't deform it. I checked the contact definitions, but I think there are no mistakes so far. What could cause this problem? I can provide the model if you want.

Thank you very much!