[Asterisk-Users] how to configure my cisco 7960?!

[xfastjackx]

hi everybody,

just tried to install my cisco 7960 - but without much success :-(

I want to set it up as a sip phone - but I can not setup the phone's IP 
address...
after plugging it in it says "Configuring IP" - I unlocked it and 
entered the "Network Configuration". I can see the edit-buttons but when 
I trie to press then it says "That key is not active here"

so how can I tell the phone the IP of my tftp-server when the phone 
doesn't let me adjust it's settings?!

thanks