Cannot active the feature

Oct 2, 2009 at 5:20 PM

When i try to activate de feature, after deploying it, i got this error "Failed to apply a web.config modification to file 'configuration/system.web/pages'. The specified node "C:\inetpub\wwwroot\wss\VirtualDirectories\39780\web.config" was not found in the web.config file.

The node exists in the web.config. Can anyone help me on this?