I was just given a Garmin 305. Yes, I know it is older, but it works. The problem is, I cannot get it to show up at all in either Express or Connect. In fact, every time I try to open Express I get an error message. HELP!!
I would be helpful if you told us what the error message actually says.
Just to get started:
The 305 synces over USB only and that means that you need the latest Garmin USB drivers installed and working properly. Have a look here:
http://www8.garmin.com/support/download_details.jsp?id=591 Note the changelog for version 2.3.1.