Help on Twido PLC

Hi,
Does any one know if there is a firmware conflict or something like that when replacing new modules on a PLC? I have a TWIDO system which was showing hardware and expansion bus differences until I found two damaged DC input modules. Once I replaced them I got the same symptom, no signal on the output modules even when I forced them and no input signal when i monitor them in the software. Any idea why is this happening?

Any help ASAP on this, will be appreciated!!
Thanks!

Suggest you ask the question on the Twido website. I have not seen this behaviour before.