It's the second time I see this behavior so I thing it worth publishing. Well all of the sudden using Installutil on service failed with an error about the Reflection, that don’t find any Installer type in assembly. This service already installed several times with Installutil without any problem so it's obvious (and I check it) that my assembly contain installer type. It's cleat that the service not already installed as service.
Nothing, but nothing seems to work. The only solution is magical rebooting (with several spells, of course). That what I found and I really will be happy if someone can come up with more practical solution.