If you are experiencing issues with obtaining communication via USB to your TS1500 tray Stacker, then please read the following information.

You need to ensure that the driver is correct and that you have only one instance of DUB-E100 listed in Windows Device Manager.

Unplug the USB cable from the back of the stacker, you will need to remove the access panel located at the tray input position to get access.  Power the entire machine down and remove the stackers' left side upper and lower covers.
Attached to the inside of the lower cover is the Ethernet adapter. Note the revision of the adapter: a barcode label that says S/N: xxxxxxxxxx H/W: A1, would be adapter revision A1. Other possibilities are A2, A3 and B. Understand that the USB cable that plugs into the adapter, can also disconnect from the inside of the stacker if you need to replace the cable. Note also that the network cable between the adapter and the Galil board is a crossover cable, (p/n: CCABCAT5CROSS) After connections are made, and before closing the stacker, power up and see what messages are displayed.

If XP asks for drivers, use the driver CD-ROM that came with the adapter. After the drivers are installed, set the IP address as per the instructions in the TS1500 Users Guide which can be found in BPWin Help. After setting the IP address, go to Device Manager and ensure that the DUB-E100 adapter is present and working properly. Start BPWin and verify that TS1500 is detected after the Serial Peripheral Scan completes. 

Remove the TS1500 Ethernet Adapter and note the hardware revision printed on the label. It will be something like A1, A2, A3, A4, B1, etc.
Go to C:\Program Files\BP Microsystems\BPWin V5.xx.x (latest)\Drivers\NIC
Notice that there are 4 different driver ZIP folders, each specific for the particular ethernet adapter hardware version. Make the proper selection and copy it to a different folder (one that will not be deleted when BPWin is installed or uninstalled) Unzip the folder to access the drivers. 
Go to Hardware Manager and inspect the Network Adapters. One should be called DUB-E100. Right click and select Update Driver, pointing to the driver folder above.
Then go to Control Panel\Network Connections and right click on the DUB-E100 for Properties and check the IP address of the TCP-IP protocol: 
192.168.100.100
255.255.255.0
Start BPWin and see if the TS1500 is recognized.

Note: In Device Manager, if there is more than one instance of DUB-E100 adapters, e.g. #2, #3, etc., this is a problem that has no simple solution. These multiple instances can be caused by repeated unplugging and plugging of the USB cable, so this action should be avoided.
You can try uninstalling these additional instances, however it should be noted that sometimes Windows will not successfully remove them properly.  Attempts can be made to remove the corresponding key or word from the registry, but extreme caution should be taken before attempting any registry changes.  Make a backup first!!!
Worse case is a reformat of the C: drive to "clean the slate", install new OS, BPWin and install the drivers fresh.

If there is still an issue, please send a log file and error description once the issue occurs for further assistance.