You have downloaded and installed METRAwin 10 / A2000 software from the INTERNET. Under Device> Communication, a connection test can be performed. You will only see dashes. Please check the following settings on the A2000:
COM 1: address 1 .... 9 or 250, baud rate 9600, parity even, protocol DIN 19244
Set the address table to DEFAULT before the connection test
If a connection still fails, check your interface cable. When using a GOSSEN-METRAWATT adapter, connect a 1: 1 interface cable.