The format of the file 'codefileblahblah.dll' is invalid.

[Nourrita]

I used the SDK regform utility to create a msi to automaticall set up full
trust for a form. When I install the form on computers in the office it works
fine but when i try to install it outside i get the following error:
InfoPath cannot create a new, blank form.
InfoPath cannot open the form. To fix this problem, contact your system
administrator.

and for details it reads:

Form template: http://urltoform/Forms/template.xsn
InfoPath cannot open the selected form because of an error in the
form's code
The format of the file 'codefileblahblah.dll' is invalid.

Can anyone please help me?

Thanks