This works for me. You have to alt tab out of the game to do it. but it works.
put in a ticket with your gameserver provider to get them to put this at the end of your command line!!!!
+rcon_startserver port:9010 pass:xxxxx +http_password xxxxxx +http_startserver port:64001
open up rconnect - version i am running is 4.102
put your ip in the adress bar - put the port 64001 in. leave the username blank - put in your password.
all works perfect, you can't use the message system they have. or anything else, you can only kick and ban people. all my admins for my server are using this.