Cannot access port (in use by another application)
A device conflict exists. This might occur if another device is installed on your computer and is
running status software. The status software dominates the parallel port on the computer and
denies the device access to the port.
Try the following remedies:
Disable all of the status windows for other devices.
Make sure that the device port setting is correct. Change the port settings on the Details
tab or the Ports tab in the device properties.
Make sure that bidirectional support is disabled for the device. On the Details tab or the
Ports tab in the device properties, make sure that the bidirectional support option is not
Onscreen error messages appear