[Incompatible Version (Solution)]

@Ryan Pennington unfortunately the tips listed do not work despite client side versions being correct.  I know as I have two tickets open right now that are as of yet not resolved.  It'll get sorted out I'm sure.

[Anyone getting disconnected from server?]

2 hours ago, Overlord said:

How are you going about connecting to it.  In your control panel where IP:port is shown there is an info button with this info.  Connecting from in game uses Game port and connecting through steam uses Query port.  So whatever your port is use the port that shows in control panel to connect through Steam and if you are connecting through the ingame browser use -1 or your port.

IP Address: "Your server IP"
Game Port: game port that shows in control panel - 1 "example 2456" (use this one to Direct Connect in game)
Query Port: game port that shows in control panel "example 2457" (this one queries to Steam servers list)

Howdy @Overlord - After I posted this I realized I may have indeed utilized the wrong PORT # and indeed it appears I was.  Now, granted I am at work so at the moment can't confirm whether or not this was my issue but will know by this evening.  If indeed this is the issue, it was a silly error on my part and a result of not paying attention.

[Anyone getting disconnected from server?]

This is happening to me as well.  Just purchased a server yesterday.  Connect to the IP,  PW prompt comes up, tries connecting then DCs.  Happens to my son as well on a different machine.