Watin test .exe file does not work in another pc

I have problem with running WatiN test .exe file in another pc. When I try to run .exe file in my own pc (where I created it) it is work well! But then I run the same test in another pc, it is not work. IE is open and start testing but then program give me this error:

WatiN.Core.Exceptions.ElementReadOnlyExcption: Element with Id:Fname is readonly.

I know what this error mean, but gist is that this test have to work. In another pc there is not Visual Studio. Maybe it is need to install something?