Saving a .dat file Compression Problem

When I finish editing the game file to my liking (Star Trek Away Team is the game), I get this error message when I try to launch the game:
'Compressed Zip File Found
Data.DAT has been created using compression. All zip files must be created with compression set to none.'
I've used 3 different hex editors and get the same results no matter which mode I edit in (direct editing or just saving after editing). Any suggestions?
'Compressed Zip File Found
Data.DAT has been created using compression. All zip files must be created with compression set to none.'
I've used 3 different hex editors and get the same results no matter which mode I edit in (direct editing or just saving after editing). Any suggestions?