You can't just change it from the client side only - the server must also be reconfigured to accept connections on TCP.
OpenVPN Access Server by default listens on TCP 443 and UDP 1194, and provides a connection profile that contains both. But from your client configuration sample you posted, I think you're using an open source based OpenVPN server. In that case you need to ensure the server is configured to listen to TCP on the port you specified, and that the port is open and reachable from your client.
