MP450 User's Guide
Page 116
... the cable directly to one on the computer itself (not the hub). Then confirm that the machine is identified. ScanGear MP Won't Start Cause Scanner driver (ScanGear MP) is not identified. Select your machine following the directions in Scanning with ScanGear MP in Initiating a Scan. z The machine may not be... within a TWAIN-compatible program. Computer Stops Operating During Scanning Cause Output Resolution set too high. It may not be selected. Problems With Scanning Scanner Won't Work Cause Machine is not installed.
... the cable directly to one on the computer itself (not the hub). Then confirm that the machine is identified. ScanGear MP Won't Start Cause Scanner driver (ScanGear MP) is not identified. Select your machine following the directions in Scanning with ScanGear MP in Initiating a Scan. z The machine may not be... within a TWAIN-compatible program. Computer Stops Operating During Scanning Cause Output Resolution set too high. It may not be selected. Problems With Scanning Scanner Won't Work Cause Machine is not installed.