Problem is with the driver, not with the source. Basically if u download the driver from ftdi site it has some problems now and then. U need to remove all ftdi drivers with the program ftdi has on there site, and then install the source again with the drivers that come with it. Or just use /comport=com<number>
Had the same problem here, fixed it by removing all drivers like above.
Last night the source couldn't find the stick again, while it was started using the /comport parameter. I restarted the Source to no avail. Once I disconnected the stick and connected it again, the Source could find the stick again. I never had these kind of problems until the last beta.
I upgraded to version Beta 2.22 20120620 and since then the standalone web server is no longer working. I'm receiving constantly an error:Failed to listen on prefix 'http://*:8080/' because it conflicts with an existing registration on the machine.
There is no other service than plugwise listening on port 8080.