HI

I have recently upgraded my SoftEther VPN server to version 4.07 (Build 9448) to take fixes for OpenSSL.I am able to connect to the VPN from a computer using the 4.04 (Build 9412) client. If I attempt to update my vpn client to version 4.07 (Build 9448), I get errors any time I connect. The errors says "Error 2: Protocol Error." This happens on any port I try to connect with. I tried 443, 992 and 5555. And yes, I do have the server listening to those ports. Here is an error entry from the client log:
2014-06-07 21: 20: 02.456 VPN Connection Setting "[real server name removed]": The connection has been either disconnected or it failed. Cause: Protocol error occurred. Error was returned from the destination server. (code 2)I ended up uninstalling 4.07 client and reinstalling 4.04 client which works. Is this a known issue or configuration change that I am missing? If not, can you look into this. If you need more details to reproduce this error I will be happy to provide those.

Please help.

I did not find the right solution from the Internet.

References:
http://www.vpnusers.com/viewtopic.php?t=3220
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Thanks!