Step 1: When hardwire connected to your WKM from your PC, go back to the "Tool" option in your WKM Assistant sofware and determine from there if your new WKM serial number appears in the lower right corner of the firmware upgrade screen. If it appears there, then this is not the issue with achieving your full datalink communication.
Step 2: Connect your base radio with provided USB cable to your Notebook PC and activate your GCS software + Turn on your MR c/w the MR datalink radio turned on.
Step 3: Use the datalink radio green/red LED indicators to confirm the two radios are communicating (see the GCS manual troubleshooting section to know what the various colors and flash rates are telling you).
Step 4: If all above issue are functioning correctly then there are other issues which might require additional computer related support for the drivers.
Your DJI dealer and/or DJI technical support with their software, firmware and hardware including datalink and MR will be strong......
but don't expect equivalent strong support for the vast array of computer related issue that can crop up with different PC hardware and MS Operating system and USB port driver issues.
For that you will need someone experienced in solving PC specific issues.
Confirm that your radio led lights are indicating a valid wireless com link.
If not, you will never get to the point where the GCS can see the valid WKM serial number upgrade.
Last nights test still shows difficulty connecting with the dreaded no permission statement.I think gtranquilla is correct about the ground station software not correctly recieving or acting on serial number it recieves from wkm main processor.In my case the first time it connected up after two tries and shows signal strength of link as all bars lit.Second time after software crash when bringing up type 1 instrument panel(type 2 comes up ok but type 1 causes program to perform fatal error and close)it took 7 or 8 tries usually after hitting aircraft position botton and seeing google map zoom up and down.So I am guessing all the problems people have been having are software related not hardware...anyway...so far I have yet to hear of any wkm /ground station user going out to the field and using the point and click ,key board contro,real flight interlink etc sucessfully on a day to day basis...anybody out there ??? Sinc kp c