I have a new Gerber GS15 plus. I am trying to connect it to a Windows 7 64 bit with Omega composer 4.0. I got the adapter cable from Gerber to connect the serial port to a USB port. I followed all the instructions, when the cable was connect it did a self download of the apropriate drives and ports. Everything seemed to go smoothly. The plotter had already been installed. I went into the Composer Que Manager and told the plotter and chose the USB serial port from the active devices list. The plotter was turned on and set to swivel knife, single cut. When I sent over a test plot I got a communications error message. I went back through all the steps. Disconnected and reconnected everything and got the same message again. The I went to my device manager to make sure all of the ports and updates were installed correctly, they seem to be fine. Another test plot had the same result. After looking at my cables again I noticed that the end of the serial cable that directly connect to the plotter is a 25 pin port. But it only has three pins sticking out. Is the right? Is that the problem? So far in internet research has been inconclusive. Any insight or help would be really appreciated.