one way communication 920 xr pci

I have a 4 port 8r 920 pci running on an XP box with Point of sale terminals attached.

I was in the midst of helping these folks add some serving lanes. I noticed the Digi driver was the default XP driver which is slow, and decided to upgrade that first. So I just updated the driver with the windows wizard, rebooted and found the com ports driver did not update, so I updated those too.

I updated the 12/04 release. I now have a new problem (not sure if it existed prior to the driver update or not).

I have a mix of terminals a 9600 and 38400 baud units (old and new). When I run my 9600 baud units, everything is ok. when I run my 38400 units, I can send signal to the terminals. The terminals seem to have problems sending communications back to the PC.

Any ideas why communications seem to fail at the higher baud rate?

The problem is likely the method used to install the new drivers. The “Update Driver” may not have worked correctly. Please try my recommended steps to get a clean installation. These steps can also be used for installing either beta drivers or older drivers, if desired.

 a. First, uninstall the previously installed device driver. From the Device Manager, expand the category "Multi-port serial adapters". Right-click on the Digi adapter(s) you would like to uninstall from the system and select "Uninstall".

Be sure to uninstall each adapter that needs to be upgraded.

 b. Run the program Dgclean.cmd to move the existing INF files for the adapter. This ensures that the new driver files will be installed instead of the old driver files. Dgclean.cmd is part of the driver software package and can be found in the same directory as the new driver files.

 c. Tell Windows to scan for new hardware. From the Device Manager, right click and select "Scan for hardware changes". The "Found New Hardware Wizard" should appear. Alternatively, one may reboot Windows to conjure the "Found New Hardware Wizard".

 d. Follow the instructions for the "Found New Hardware Wizard". Do not install from the internet. From the "Locate Driver Files" screen, be sure to select "Specify a location" Advanced, to point the wizard to the location of the new driver files.

 e. Depending on the driver version being installed, Windows may display a "Digital Signature Not Found" message, explaining that the driver is not signed.  Click "Yes" to continue the installation. One may see several of these warnings (one for the adapter and one for each port)-- simply click "Yes" for each message to proceed with installation.

 f. Follow any other instructions to complete the installation.

 g. The "Found New Hardware Wizard" may reappear a number of times depending on the number and type of adapters you are installing.