I Don't Hear Mbox And Axiom25 Through External Port(pro Tools) Options

[evangelos]

Hi, I run a Macbook pro 2.2 with pro tools 7.4.2 an Mbox2 and an Axiom25. I wanted to ad a mouse so I can work faster with he editing. But the Macbook has 2 USB ,so I had to use an external USB port. Now to start with it is written in the Mbox manual that the Mbox should be at the left port of the Macbook. So I tried first to divide the right port of the computer-which had already the Axiom25 on. Nothing. It is not that I cannot monitor. No sound actually arrives at the Pro tools. When from the other hand I tried the same thing at the left port of the computer-which had the Mbox on- a message the that the pro tools don't see Mbox anymore ,make sure it is attached and try again. Should I configure something,change a setting? The external USB is a simple 4ports Targus and did not hade any installation CD. Any idea?