file not found.

I was changing something from the headermenu.aspx and honestly I do not believe I changed anything big. If I changed anything I probably undo it but when I uploaded the file and tried to load my site it didnt work. I keep getting resource not found (file not found) on any page I access. Is there a way to get a backup copy of a previous date if it was made? Or can anyone post their default one. I need it in a hurry

Thank you in advanced.

if you need the default one then just download the package again.

did you change anything in the code behind cs page?

check to make sure anything you are referencing in the header page actually exists. I.E have you changed the location of any of the modules by accident?