When using a SIP phone ( 5000i-8/24) the Directed park doesn't work and System Park only puts a call in park....

Besides a seperate button to retrieve parks,
anyone got any ideas on how to do it.
Currently i am using
direct parking a call -- autodial *66,,,60

retrieve directed park --autodial *65,,,60

It works but wastes 2 buttons... and on an 8 button phone, I'm trying to make other things available.

thanks