It wont let me edit my website

When I try to edit my website a SYNCHRONIZE File tab opens and says :
The local and published versions of this file are different. Both files have changed.

It wants me to download the publish or local copy.

neither one works.

Drew has fixed this for me a couple of times and it has worked fore one sign on then
i get this all over again.

I really need to be able to sign on and make changes to my website with out this 

happening.

Please let me know if you can fix this problem.

You guys have been great until this problem showed up weeks ago.

I need a website I can count on.

Thank you, Jodi

I did empty my cache and cookies many times it doesnt help.