plextool problem

i have just got a plexwrite 40/12/40a when i install plextools with the writer hooked up to my artec 16 speed dvd drive my desktop lockes up if i do it as a standalone install my plextools run no problem i want to have it hooked up to the dvd drive anybody suggestions please btw the writer works no problem hooked up to the dvd drive
cheers
 
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