> Sometimes i got a similar problem. What i did.
> 
> service gst stop
> 1. Shutdown NMC server (ensure that gstd is not running)
> 2. Go to <NMC install dir>/cst
> 3. Remove the following files - csp.clb, csp.clb.bak, Config.xml
> 4. Copy Config.xml.template to Config.xml
> 5. Start NMC server
> service gst start
> 
> Symptom NMC start and all the ports listen, but when you tried log in.
> Gst died.
> Check httpd also, sometimes gst stop can't stop httpd.

 This did not work here. And I made sure gst/httpd were not running.