If you exit MooseEdit, restart it and reload the SP_01 save, does it still show the changes you made?
Maybe it is not actually saving, but when you re-load it in the editor it keeps the changes.
Are you shutting down all non-essential programs, such as anti-virus (that could be conflicting with or actively blocking edits to the save folders)?
OMG, thanks Raze, it finally worked after I turned my comodo anti-virus off ! I can't believe why I did not think of that!!
Thank you! You are my hero!