Regarding error while running in the server

hi i am running the application on server due it data should get updated regularly and load to internet and server contains server 2008 standard edition i had given full permission to everyone but i am getting the error while running in the server. If i run it local lan or local system it works fine . Please follow below error details 

Unhandled Exception: System.IO.IOException: The device is not ready.


   at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
   at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, I
nt32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions o
ptions, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy)
   at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access,
FileShare share, Int32 bufferSize, FileOptions options)
   at System.IO.StreamWriter.CreateFile(String path, Boolean append)
   at System.IO.StreamWriter..ctor(String path, Boolean append, Encoding encodin
g, Int32 bufferSize)
   at System.IO.StreamWriter..ctor(String path, Boolean append)
   at System.IO.File.AppendText(String path)
   at AWLILiveUpdate.Program.Main(String[] args)