ezmoneychuck

I am new to fly fishing. I have a 9' 4 weight Clearwater pole that I received as a present. It has 4 weight forward floating line with 6' tapered leader and 3' tippet What is the largest fly I can cast with this? I tried casting a #10 streamer and could only cast maybe 30' at the very max, and then the whole leader/tippet/fly comes down in a big pile... Any help would be appreciated Chuck Arroyo Grande