Cant call park

How do you call park?

I have set up everything in the features.conf file like i think i should. but how do i do a call park on the phone? i think i might be doing that wrong. I got a GS 2000

if you don’t show us your features.conf, and the sip.conf entries for the phone in question, we’re shooting in the dark.

parkext => 700
parkpos => 701-720
context => parkedcalls
parkingtime => 45