Winner!!!!!
Yes, I have AlaskanGrizzly's kneeboard builder ver. 1.6.7.9 and realease DCS 1.5.4
I've only had a viewporthandling_original.lua, but I deleted the three files posted above and run a DCS repair. Didn't start again Kneeboard builder and now I can see my custon kneeboard in single player and multiplayer.
Thanks!!