Hello, I’m new here and I’ve got the same thing as usual? A problem Well, it’s not very interesting to know. I bought an interface from ebay and downloaded from ross-tech demoversions from VAG-COM. One time v. 311.2 and one time v 409.1 Have a notebook with serial port. Have both versions installed and found that it runs with V 311.2 without problems, and with V. 409.1 the program reports that the interface is not available. And what is the difference between the two versions? Is 409.1 perhaps a bit more comfortable than 311.2? Well, on the notebook, Windows XP SP2 is on it and most other (operating system only) Windows firewall is inactive. Thank you for your tips. Greeting Andreas