Can't edited my Wordpress file

I face a new problem. when I am going to edit my wordpress file for example; want to edit header.php , a message is shown
'Sorry, that file cannot be edited'
What am I now doing? Why I have to face this problem? Can anyone help me? I thankful to u for ur help.

 

Have you chmod the files? If not then go change permission of the files to 666.

 

* Using your FTP client, navigate to your active Theme's folder (/wp-content/themes/(your theme folder).
* Once in there, right click on the header.php file.
* Select the Prperties/CHMOD/Permissions option from the context menu.
* Change the permissions to '777' to make the file writable. Click Ok.
* You should now be able to edit your file within the editor

HTH - Scott

 

thank u to all. I try to fix the problem

 

change chmod 666 for ur theme files so u can update files in wp admin.

 

dont forget after you change pemsission a file, change it back . better use chmod 666 not 777

 

hmm..I did faced the same issue few years back. Try to chmod the file permissioin but doesn't help, and really no idea why. Finally, I reinstall the WP and everything is fine.