I had a message saying there were protocol problems. In my case as a new user I had just 'installed' sedcondlife. A bit confused but I had downloaed the two items secondlife and secondlife viewer and assumed they were installed as most times a downloaded item automatically installs. I could not find secondlife in my programs and so accessed the site with my firefox browser. OK so far. Opened and account and after having trouble finding it, clicked on the link in the top lh corner to enter secondlife. Up came the message from firefox with a protocol problem. I gave up. However the next day I went to my control panel to delete second life program and it wasn't there.! I found the setup.exes in my download folder and ran both. Now a shortcut to secondlife viwer appeared on my desktop. So if you have this error just check the programs are installed. The fact you can open account does not mean that they are.