When you first install the AlinkPlus software and you wish to then Direct Connect to a Solution 2000 or Solution 3000 panel , you must install the USB drivers for the DLA on your computer.
The DLA Drivers are already on your PC , they are in the AlinkPlus folder where you installed the software.
You will need to connect the DLA to a COM port on your pc and then go into the DEVICE MANAGER
select Ports COM and LPT
You will probably see the USB device but it will have a yellow triangle to indicate it has no driver.
You must then right click on the USB device and select Update Driver.
You then need to BROWSE to the following
C:\Program Files (x86)\Bosch Security System\A-Link Plus\USB_DRIVER\DLA then click OK
The driver should then be installed and you should be able to connect to the panel and upload and download.