how do you down grade your client so your stuck at 4344 patch or something

im trying to make my client be 4353 or what ever, and im al ready at new patch ect, but when i put in the older patch and try to log in, it cant get into the servers, what do i need to do , so i can stay stuck at an older patch version client

You can't use the old old clients on the official servers anymore. There have been packet changes and only the more recent clients will even work at all with it. I think the 4350+ is as old as you can get until it just won't work anymore. You'll either need a proxy or to edit your client to send a more recent version so the server doesn't complain about it.

4356+ is as old as you can go, after that the new packet structures take effect and another thing. Before even trying an older patch the IPs will be wrong lol.