recently i get a IBM-notebook-computer for PLC-programing,but it no com-port,only two usb-ports,then i buy a transfer-head of usb to com,when i plug the transfer-head into usb port,the notebook can't
recognize the catransfer-head,and tell me to install transfer-head-drive.who has this drive,my friend of need,pls email:czp0070@sina.com
thk you very much,you are good!