Error: cannot show this file

System.IO.FileNotFoundException: Could not find file '\\p-unc-01\content$\cheeso.members.winisp.net\wwwroot\source\misc\copydata.cs'.
File name: '\\p-unc-01\content$\cheeso.members.winisp.net\wwwroot\source\misc\copydata.cs'
   at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
   at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy)
   at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access)
   at ASP.srcctrl_ascx.Render(HtmlTextWriter output) in \\p-unc-01\content$\cheeso.members.winisp.net\wwwroot\SrcCtrl.ascx:line 70