Hi all im having a problem connecting my laptop a philips freevents 11NB5800 to my mitsubishi PLC using the prolific usb serial connector. I can connect with my opc server for my scada software package to the PLC but when I run a connection test through Gx Developer i get a error saying "Cannot communicate with PLC. Excute again after checking the connection with PLC. And a code <ES:018002007>". I have checked on my PC which com port is been used and its COM 4 and in GX developer I went to ONLINE then TRANSFERE SETUP and changed the com port to COM 4 and ran the connection test but keep getting a error.What i find strange is I can connect through OPC server to PLC through the usb serial connecter but not through GX developer with the lead. Any help would be great.