Rodney,
Current Norvel instructions suggest putting some lube such as WD40 in the cylinder and let it set for 24 hours before starting the engine.
When I got my first Norvel .049 and .061 they were having trouble with the glow plugs they were using. They had switched to a new type plug and included the new type in the box with my engines. Since you did not specify the age of your engines, I assume you may have the old plugs. All this was before they switched to the anodized aluminum cylinders.
I usually use parallel "D" cells as a booster for those engines and I do not have trouble. I think the problem occurs mostly when you use a NiCd booster.
Did you pull the plugs and see if the booster makes them glow?

George