please help…

I have this tenor A800 and I want to change the ip address that is receiving my calls to a new ip address. What is the code that i need to enter to config this:
Config#…?

This is what I have
H323 Gateway
—————–Route #2
Primary GK Address = 66.288.219.70
Gkmode = Destination is
Primary Auto Discovery = 1
C
Secondary GK Address = 0.0.0.0:1720
Secondary Auto Discovery = 0 Public LDN prio
H.323 ID = ha66534255
Register DN = Register as GW Prefixes(1)
config be sroute
Ignore Bandwidth in ACF = no(0)fig be# exit

I want to change the Primary GK Address = 66.288.219.70 to 12.458.912.80 and delete the ha66534255

Thanks