My first plc program

[mutimuti]

I have connected everything to just switch one light. I have programmed it. I am using Moeller PS4-141-MM1, PLC. When I try to transfer the program, there is a complaint about an already existing program (the last programme was for a different task). There is also a complaint about the devices. The software Sucosoft Version 5 seems to recognise only PS4-200, 300 and 400. How do I override the old program? How do I add another device to connect to? Help!

 

[bmnet]

Thought there should be an option to erase (blank check?) the module 1st...
Or overwrite the without asking..