please help to restore the RSLinx communication between the AB 1762-L24bwa and PC.problem start after I changed driver from DF1 to DH485 in channel config menu to establish connection with C-more HMI, now HMI is working fine, but I can not reconnect to my PC any more.Inside the RSLinx driver config menu I do not have DH485 driver for RS232 port(only rs232DF1 device or dH485UIC device)????