How to connect to mission planner using UBLOX TOBY-L200?

According to the documentation on the pixhawk telemetry, i can interface between the ublox and pixhawk using the AT commands i have already ran all the necessary commands but mission planner is still not connecting to the pixhawk using TCP, so if any of you have advice or have done this any info is helpful.

have you read this
http://ardupilot.org/copter/docs/common-connect-mission-planner-autopilot.html