blackbox is not much used these days. i used to use the windows version for a while, and from that experience i can recommend some links where you might get advice:
http://www.boxshots.org/
http://blackboxdesktop.deviantart.com/
and, on deviantart, the member
pitkon has been extremely active & helpful.
oh, look, there seems to be a replacement for lostinthebox forums:
http://blackbox4windows.com/
sorry i can't help with the actual problem...