When the UniWS buttons are greyed out like that, it means that it cannot detect the correct version of the game executable that it was intended to modify.
In this case, UniWS was designed to work on the normal US 1.03 version executable.
So the options are:
1) You don't have the US version.
2) The patch wasn't applied correctly.
3) You using a no-CD EXE.
In these cases UniWS unfortunately won't work. Someone would need to track down the appropriate hex edits for the especific version you're using.