PKALL on 2004 F-150

I am trying to install a PKALL that is tied to a Viper 4806v (via D2D) to work on my 2004 Ford F-150. I have been unsuccessful in programming the PKALL and have tried many different ways and timings but the PKALL light always stays solid. The odd thing is that I have two factory keys that both work in the ignition independently but when I plug in (and try to program) the PKALL only one will successfully authenticate at a time. The second key will always fail as long as the PKALL is plugged in. As soon as I unplug the PKALL both keys start working fine. When I try to insert the second factory key for programming the PKALL the security light flashes rapidly instead of going solid and turning off after 3 seconds (like the 1st key does).

Below is the thread I've referenced many times trying to figure out what is wrong but no solutions were ever posted and none worked for me. Any help is much appreciated!

https://www.the12volt.com/installbay/forum_posts.asp?tid=144121

My current configuration is what the Install Guide recommended:

4 pin D2D harness is
Viper 4806v D2D port (red) -> PKALL D2D port (white)

6 pin harness is
Pink -> Red/Yellow @ Immobilizer Harness Pin 1 (Ignition-tested, 12v when key is in the "ON" position)
Blue/White -> Blue/Black @ Immobilizer Harness Pin 2 (Ground-tested)
Yellow/Black -> White/Green @ Immobilizer Harness Pin 3 (TX Data)
Purple/White -> Gray/Orange @ Immobilizer Harness Pin 4 (RX Data)

The PKALL Blue/White wire goes to the 4806V Dark Blue (-) Status Output wire, Pin 5 on 24 Pin harness.
The PKALL Pink wire should go to the Viper thick Pink IGN wire ( which also connects to the F150 Dark Blue/Light Green IGN wire ).

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Soldering is fun!

Thanks for the reply. I'll give that a go.

Should work. Timing is critical with the 2 key method.
The PKALL bypass control wire going to constant ground was definitely was causing the programming issue.

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Soldering is fun!