Gomen nasai! I couldn't quite figure out your problem in your description... However, if you meant "The Library" in the game (Sakura's Dad's basement), mine once did that too. Afterwards, I reseted my computer and tried it again. After that, it didn't go black anymore.
By the way, thank you for visiting my site!
Princess Sailor Mars
[Webmistress of Card Captors(.shim.net)]