I can't log into DCO-106

Try running the standalone version of DCO-106 to see if that allows you to log in. Sometimes a firewall or other security software might be blocking your DAW from accessing the Internet.

Of course, also make sure that your firewall isn't blocking DCO-106 itself.

If those suggestions don't help, you can submit a support request. Please include helpful details, like which operating system you're using, etc.