Hi Paulo,
Can you provide us some additional information on what you are trying to do? It sounds like you are successfully entering the pullstream command. It is important to note, however, that a "SUCCESS" returned from the command only means that the command was successfully executed, it does not guarantee that the stream is actually pulled (since the stream itself may not yet exist). Can you provide the following so we can help you debug this:
1) the pullstream command you have used
2) the source of the stream you are using. (what software is it coming from, and where is that software running)
3) What URI you are using in JWPlayer
Thanks,
Bryan