Hi Erel, I tryed to install the new version on the desktop, but get the message below, asking for .Net Framework version 3.5. After clicking on yes, I got on the B4PPC web site where I find only .Net Framework version 2.0. The e-mail says .Net Framework version 2.0 is needed but this one is was already installed on my desktop. But we need version 3.5 . After downloading .Net Framework version 3.5 from the MS site and installing it, I could install the new B4PPC version. It would be interesting to have the link to it on the B4PPS website. Thanks to agraham, before insatlling version 6.75, I renamed the directory of version 6.50, and installed version 6.75 in another folder, not the default one. Without any problems. I get also the error described by agraham with the Door library. But he was fater in finding out what happend. Best regards.