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What exactly is the problem with your 890? The 890 should use KPG-44D software, and the KPG-43U cable if I recall. Connect the cable to your PC, open up the 49D software, click "Setup>Com Port" this will open a little window. Select the comport the programming cable is using (Usually it will be the only com port available) and click OK. Now, with the radio turned on and the cable connected to the radios mic port, do a read from the radio. If you get an error, please share it here. There is a reason for having you do these steps. First, some radio's require matching S/N's in the programing dat file. Having a mismatched file wont allow you to upload to the radio. Second, by uploading a random dat file you may not fix whatever issue you are having. And third, if your new to the software, this is a great chance to learn about the software and features that others may not include in the system.

If the cable or connectors between the radio and the meter are defective, that might account for the problem. How does the radio work on receive?

Jeep enthusiasts should be familiar with DX engineering. It is a great place to buy ham radio and GMRS parts and accessories. Also, a great place to buy off-roading parts and accessories - from their sister company - Summit Racing Equipment. Summit Racing == DX engineering.