This is primarily a Firewire communication error. Try the following:

• Download and install the latest drivers for your M-Audio hardware, available at www.m-audio.com .
• Download and install the latest update of Pro Tools, available at digidesign.com > Support > Downloads > Index of CS Updates > Find the latest update for your version and Pro Tools and operating system.
• Try a different Fiewire cable and/or port.
• On a PC: Uninstall your Firewire controllers from the Device Manager. They will be listed under "IEEE 1394 Bus Host Controllers." Right-click on whatever shows up in this category, choose "Uninstall," and reboot the computer. Click "Next" through any Found New Hardware Wizards that pop up.