Asterisk VoIP Won't Disconnect

Hello Everyone,

I hope I have found a place to find help with my Asterisk system. I am aware that this is primarily OS based, but I'm new to this system and need help urgently. Perhaps someone familiar with the VOIP Systems in general can help.

At our office, we are running approximately 3 lines. The last line, Extension 1111 remains lit 24/7, and it has for the past two weeks. When you attempt to press the button to communicate with this user the message " Extension 1111 This person is on the phone, please leave a message after the tone! ". is played back. When in all reality, the user is NOT on the phone.

I'm not too familiar with the system, as our current technician is out on sick leave and ultimately unreachable. I do know that we have a web-interface on the local network with the IP Address 192.168.x.x. And when I access this it gives me the following options:

" Asterisk @ Home "
+ Web Access to VM
+ CRM
+ Flash Operator Panel
+ Asterisk Management Portal

Continually we have a server running a DOS-Like Asterisk environment that displays a prompt for a password. Above this prompt is a text line of :

CentOS Release 4.2 Final
Kernel 2.6.9-22 ELsmp on an i686

For what its worth, we use individual IP Phones throughout the office (Snom 360's).

I apologize for my lack of better understanding, I'm working with the best I can. Any help or ideas is greatly appreciated. I'm not sure if there is some type of setting off on the IP Phone itself or if something is seriously off with the server settings?