Solution:

USB to serial converters will only work if the USB device is the PC. There is no device that will allow you to do the opposite. Q: Does a USB to RS-232 Converter work both ways? A: The RS-232 connections provide standard inputs and outputs that match a regular 9 pin or 25 pin serial port. A USB converter must connect to a USB Host port. The USB connector (Type A Male) only fits upstream device connectors (Type A Female) such as a Host port. USB Device (slave) devices which don't have a cable attached have a downstream (Type B Female) connector. Q: My computer has only a 9 pin serial port but my new device (Printer, Camera, etc.) has only USB Connections. Do you have a converter that can be used to connect them? A: You need a USB Host Connection to support the USB device. A USB Host Connection cannot be supported by RS-232 Serial port connections since the USB host port requires a microprocessor and software to drive it. In theory, a USB Serial Server is possible, but not practical since special drivers would still be needed on the computer for each device.