jmeter - how to run jmeter for port other than 8080

I have a web app to test whose running port is 9080. So when I set the proxy in the mozilla to localhost and port 8080, and set the port in jmeter 8080, jmeter is unable to fetch data from the port 9080.

I have also tried using the port 9080 in jemter.

Please help !!