File Not Moving

Im having an issue with being unable to move a file. Perhaps a fresh set of eyes may be able to point out if i am missing something:

Code:

-- Determine if there is a claims.mpn file to be backed up
found = File.DoesExist(_SourceFolder .. "\\claims.mpn");

-- If file found, backup to OldClaims folder otherwise alert user no file to backup
if found == true then

 -- Determine if there is an OldClaims folder, if not, create it
 claimsfolder = Folder.DoesExist(_SourceFolder .. "\\OldClaims");

 if claimsfolder ~= true then
  Folder.Create(_SourceFolder .. "\\OldClaims");
 end

 -- Set variables for current date and time
 cdate = System.GetDate(DATE_FMT_US);
 ctime = System.GetTime(TIME_FMT_AMPM);

 File.Move(_SourceFolder .. "\\claims.mpn", _SourceFolder .. "\\OldClaims\\claims_" ..cdate.. "_" ..ctime.. ".txt", false, true, false, false, nil);

 Dialog.Message("Finished", "Your claims file has been backed up.", MB_OK, MB_ICONINFORMATION, MB_DEFBUTTON1);

else

 Dialog.Message("Error", "No claims file to backup", MB_OK, MB_ICONINFORMATION, MB_DEFBUTTON1);

end

I get the dialog that the the file was backed up, but the file remains in the source folder and there is nothing in the OldClaims folder.