Thinapp a MS-Dos application

Hi all,

Just having some trouble creating a thinapp of some ms-dos programs. The process i used is no different from a regular app. I go through the pre-scan then copy the necessary files to the pc and create shortcuts to the desktop and then do the post scan. From what I can tell the capture, captures the files files I copied to the PC and then I create the thinapp package. Once I do that when i try to run the thinapp i get an error

filename.pif is not a valid win32 application. any help is appriciated.

thanks