you are very, very sparse on the details.
is there more than one instance of SQL on the machine, and that is why you changed the port number?
why did you change the port number anyway?
SQL browser , if it is running, will direct connections if they try to connect to say, MyMachine\SQL2012 to the right port, and usually that is the dynamic port, becasue a different, default instance is listening on 1433. If that is the only instance, then change the port number back.
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