Can't access System config / Settings section

[Spektro]

Ok boys, the server (ISPConfig) are running proply but when i try to change the System config settings the page are missing!

Can't access to in the tab Management:
System Config / Settings
Server / Settings
Server / Status
Server / Services

The pages are missing, and the images "nav_lft.gif" too

I think that the missing images is because my domain is not register and i loggin in the server typing the IP not the machine.domain, it's right?

Can somebody help me?
--> Really really thanks to Falko and Till for the quickly support on this forums ^^
* And sorry for my english, it's very very bad (Una full de Estambul haha :P)

[till]

Please have a look here:
http://www.howtoforge.com/forums/showthread.php?t=241