Hi, I am using several cheap bt modules with my dev systems. I am using IVT BlueSoleil (the application/driver comes with the Sweex usb bt dongle) and I am in doubt whether it will work without this application (under XP). There are always two ports listed (ie com15, 16) - no idea why, when connected to the first bt module the third com appears (com17) and this is the com I connect myself to via ie teraterm. When you connect to the second bt module the com18 appears and so on. I do not care what XP device manager says, never checked that, everything is managed via BlueSoleil application/driver (a small BT icon in the taskbar). The bt modules need to be set to a specific baudrate, default was 9600 with mines. P.