I have used this guide to install on a mining rig I build myself.

http://litecoinstuff.com/tutorials/how-to-configure-xubuntu-cgminer-and-r9-290x-gpus-to-mine-litecoin-and-altcoin
I have an Asrock  990RX Extreme9 motherboard with 4 Gigabyte Radeon R9 290 cards

I am really stuck and frustrated

Someone previously mention to check and see what happens when I type aticonfig --lsa
I get the following:
 0. 01:00.0 AMD Radeon R9 290 Series
  1. 04:00.0 AMD Radeon R9 290 Series
  2. 05:00.0 AMD Radeon R9 290 Series
  3. 06:00.0 AMD Radeon R9 290 Series

* - Default adapter


I am getting the following error message, when I type the following command:
./cgminer -n


 can anyone help me?

 [2014-01-04 16:00:40] CL Platform 0 vendor: Advanced Micro Devices, Inc.                   
 [2014-01-04 16:00:40] CL Platform 0 name: AMD Accelerated Parallel Processing                   
 [2014-01-04 16:00:40] CL Platform 0 version: OpenCL 1.2 AMD-APP (1214.3)                   
 [2014-01-04 16:00:40] Error -1: Getting Device IDs (num)                   
 [2014-01-04 16:00:40] clDevicesNum returned error, no GPUs usable                   
 [2014-01-04 16:00:40] 0 GPU devices max detected