Seismovision 2.26 wont allow me to change mod HELP!!!!!!

[Kotz]

Hi

Ok I have had seismovision 2.26 working on my Pc before. I recently had to format my Pc and did a fresh install of Seismovision now the program won't work. It won't allow me to change the mod as box is grey and you cannot select it. I keep getting this error when I try to run a demo

Client/server game mismatch:'Enemy Territory/ETPro'

Seismovision has detected I have ET installed but like I say won't allow me to put in which mod I am running.

Have reinstalled program several times and run wizard with same results.

Can anyone help please.