Hi Arianna, I have no direct experience with this, but the LT requires some fancy hardware handshaking settings so that it can responde properly. Check the USB to serial cable software and see if they have any settings for hardware handshaking. If so turn on everything they've got. Otherwise call RC systems and they'll probably know about particular USB to serial adapters which work withthe doubletalk LT. rC systems Inc. 1609 England Av Everett Wa.98203 800, 4253553 or [log in to unmask] Hope it works. Tom Fowle Net-Tamer V 1.13 Beta - Registered VICUG-L is the Visually Impaired Computer User Group List. To join or leave the list, send a message to [log in to unmask] In the body of the message, simply type "subscribe vicug-l" or "unsubscribe vicug-l" without the quotations. VICUG-L is archived on the World Wide Web at http://maelstrom.stjohns.edu/archives/vicug-l.html