Hamachi:High level of connection requests
This can happen at peak times, when a large amount of users try to connect simultaneously. The problem is on the server side. Typically, the only time you will see this message is during the period right after system maintenance.
The problem actually solves itself after a period of time as the logon requests taper off back to normal. Hamachi will offer to queue your connection request, and put you in line to log in.