Right click on the file. There should be something regarding either CHMOD or Permissions. If your server allows you to do it yourself, you'll be able to do what you have to do.
If not, contact them telling them the file, where it's located and the permissions required for the file.
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Please also see our parent organization VNC Web Services if you're in the need of a new UBB.threads Install or Upgrade, Site/Server Migrations, or Security and Coding Services.