Hi Anubhav,
Unfortunately that is not the problem. It's not feature 0 only key, see attached screenshot from Sentinel Admin Control Center. And as I wrote, putty.exe works through remote desktop with exactly same setup. I've tried everything I can think of, but I cannot make this other program work.
Please find .prjx files in attached zip.
Regards,
Matti
Edit:
Oh, did I miss your point? Do you mean that the key can NOT have the feature 0 present? If so, how can I remove it?