Why change from wired to wireless? Unless I had a very good reason, I would always keep a wired connection, even if it were USB, to my router than choose a wireless setup.
I do have both wired and wireless machines and invariably the wired system is much better. It is faster and more reliable.
Unless you have done some moving around and it is not convenient now to use a wired connection, I would strongly suggest going back to your previous arrangement.