Each time I start WoW everything's reset.

Hiya, as the topic says, everytime I open up WoW the audio and video settings are resetted to default and also my account name is gone from the bar where you type in the information. Silly problem, and easy to "fix" by just setting the settings, but each time I close it it's resetted. Anyone got a clue?
Thanks!

Right click WoW folder, select "Properties" and uncheck "Read-only".

Problem solved, thank you very much :)

I unchecked it but when I enter properties again Only-Read is marked, what can I do?

It works after all, sorry and thank you