Glad to hear it was a simple solution.
It is not necessary to set BenQ to sec master, if you are having no problems.
From what I have read & garnered through the forums, the preferred setup is to have the BenQ as Master, regardless of what channel the drive is on. (the Primary master setting would apply if you had your OS on SATA HD drive(s) on SATA, & your opticals on your Primary/Secondary IDE channels).
I also believe that a senior poster claimed better performance if they did not have anything as slave device to their BenQ as master (this may be system specific). I have yet to confirm this on my own systems.