Hi,
Can you try the following:
1. Disconnect your adapter
2. Uninstall DisplayLink software
3. Download and run this tool
http://www.displaylink.com/support/ticket.php?id=297
4. Install DisplayLink software v7.6M2 from here
http://www.displaylink.com/support/sla.php?fileid=124
5. Reconnect your adapter
Thanks,
James