Steam Ludwigsbahn, Schifferstadt Signals Set To Red But Hud Shows Green

I am at Schifferstadt eastbound approach and the distant cleared as I was approaching, but the approach (signal A) just before catenary post 93/8 showed red. I stopped at this but the HUD showed it had cleared to enter Schifferstadt eastbound, contacted signaller and got proceed but the PZB stopped on 2000 and now I can't proceed. This happened on multiple attempts on timetable run when the objective was to stop at Schifferstadt eastbound. What am I supposed to do to stop this happening?