Vlad, thanks for a good direction to play with. I think the parameters are the problem. I may try to run it as SP with parameters object instead of sinple SP call.
By the way, how I can run and debug my com object on ther server, and see what cause the problem, as you have mention, it's a shame to admit but I dont know how can I do this.
Meni treba poyasnyty ya ce vono debagaetsya.