Nec 3550 burning failed

i had a new dvd burner installed. nec dvd rw nd 3550A. it won’t burn anything.
i took it back to the guy who installed it and he said the aspi wasn’t installed. he installed it and it worked. i burned on cd. i tried to burn another cd and now its doing the same thing, but the nero info tool says aspi is installed and working properly. someone help please. i have nerostartsmart