braille lite 40

Hi Guys, I have a Braille Lite 40 display. I plug it into /dev/ttyS0, and boot SuSE Linux installation. A sighted friend tells me that it says "probing for braille displays" and then launches setup; nothing appears on my display. My display is in "Speech box mode" which is the usual thing to do when using the Braille Lite as a braille display. Any help would be appreciated. Anyone elese out there using the Braille Lite with SuSE-BLinux? Kindest regards, Saqib Shaikh