Server Running as Application Error

[Galaxiom]

Sever running as a service on Server 2003 R2.
Viewer on XP Pro SP3
Connection via LAN. Both machines on same domain.

Using MSRC4Plugin.dsm (We want this level of encryption)

Was working fine on 1.0.8.2 but after installing Upgrade to 1.0.9.5 on both, the client is unable to connect to the Server.

After authentication I get a black viewer window with error:
"Server closed connection -The server running as application".

From reading another post this sounds like a poorly chosen generic error message for disconnection. Definitely is running as a service on the server. It shows up perfectly normally in services.

Tried clean 1.0.9.5 install on viewer machine.

Can connect to other 1.0.8 servers with the new viewer.
Can connect to the 1.0.9 server using the old vncviewer.exe from machine with 1.0.9 installed or from others with 1.0.8 installed.

Just not 1.0.9 to 1.0.9

Also noted that toolbar icons for toggle remote input, file transfer, single window, full desktop and chat do not appear when connected to the 1.0.9 server.

[Galaxiom]

Connection works with the new viewer if the encryption is turned off.

So it would appear the 1.0.9.5 viewer has a very odd plugin compatibility problem.

[redge]

search and remove lang.dll from your windows install or ultravnc 1.0.8.2
upgrade don't touch the language file. it make trouble for users use another language than english

the default plugin with 1.0.9.5 is not msrc4plugin.dsm but securevncplugin.dsm

so you also need to update the shortcut of your vncviewer.exe as below:
Run UltraVNC Viewer (Listen Mode Encrypt))
"C:\Program Files\UltraVNC\vncviewer.exe" -dsmplugin msrc4plugin.dsm -listen 5500