Need help with old Kindle Dxg

[KindleDxgFool]

I have use kindlePDFviewer for the longest time. Occasionally, it would become messed up and I would reset to factory defaults and re-jailbreak and everything. I can no longer get it to work. My process was to jailbreak, mkk, launchpad, custom folder with kindlePDFviewer in it and then Shift- Shift I, Shift-Shift Space, then Shift-Shift-P-D. The last step says success, yet nothing happens. Is this due to Amazon discontinuing support for this old dinosaur? I am running firmware 2.5.8 and its a Kindle Dxg. I bought it on Craigslist and am pretty sure its a developers kindle or a test kindle, I remember finding that out somehow. (oh yeah it has no serial number on the back of it)

I have tried other methods with no success to get kindlePDFviewer to work like Kite and Kual. Kual says "this device is not registered as a Test Kindle to run this title ..." But I have the newest Mkk kindlet installed.

Please let me know if this is still possible and if I am going about it the right way. Thank you so much for any help you can give me.