Unless you've alredy run out of data, you don't need any more.
If you're trying to stream HD, it's going to try to poll the streaming server a lot and may be too much latency for the streaming server to handle - that's why it buffers. Try lowering the stream resolution so it pings the server less.
It's been a while since we last heard from you, so we will close this thread. If you still have concerns, please start a new thread and include a detailed explanation so we can better assist you.