Coding on Windows Vista, Compatibility Files Problem

Hello, i just got new computer equipped with Ms. Win Vista.

As soon as i code mql in metaeditor.. i found weird thing... it's the files that i code can be overwritten (access denied).. i try to "save as" with the same name and it successful, BUT... when i attached the ex4 to the chart.. it always display the old files...

finally i found out, that everytime i do 'save as' new files will be stored and viewable when i click "compatibility files"..

so basically i create two mql4... now.. this workaround is confusing..

can anybody share any solutions...