JAC, no creo que sea por la versión de PT... ¿lo estás corriendo en windows? porq si es asi te recomiendo que leas esto:
USB (Universal Serial Bus) must be enabled in the Windows System Device Manger control panel and in the computer's BIOS (if the option is available)
Each IDE drive must have DMA enabled in the "System" Control Panel. This can be changed in the "Settings" of each IDE drive on the "Device Manager" tab of the "System" Control Panel: detailed instructions
Pentium 4 systems with HyperThreading technology must have "Intel HyperThreading" in the system BIOS disabled in Pro Tools 6.x. Pro Tools 7.0 and higher supports HyperThreading.
Although not a requirement, removing or disabling startup applications, system utilities (i.e. Norton Utilities) internal and external hardware devices (i.e. tape drives, Ethernet cards, scanners, TV tuners, non-Digidesign sound or MIDI drivers) may increase the performance of Pro Tools. Just keep in mind: the more you demand of Pro Tools the more Pro Tools demands of your system.
Windows XP Service Pack 1 or Windows XP Service Pack 2 required. To find out if you have Windows XP Service Pack 1 or 2, right-click on My Computer from the Start menu or your desktop and choose Properties. In the General section, it will say "Service Pack 1" or "Service Pack 2 "below where your operating system is listed.
To ensure compatibility, check with the manufacturer of the various system devices you plan to use, to ensure that you are using the latest software or drivers for Windows XP.
Pro Tools TDM and LE 6.1 and higher software can NOT be installed on systems running Windows 2000, 98, Me, NT, 95, or 3.1.
Windows XP Media Center Edition and Windows 2000 are not supported with Pro Tools 6.1 and higher.
Pro Tools TDM 6.1 systems are compatible with Japanese versions of Windows XP. Other double-byte character versions of Windows (Chinese, Arabic, and Korean, etc.) are not supported with Pro Tools 6.1 and 6.2.
Pro Tools TDM and LE 6.4 and higher systems and Pro Tools M-Powered systems are compatible with Chinese Simplified, Japanese, and Korean versions of the Windows XP operating system.
Pro Tools M-Powered is qualified with Windows XP Service Pack 2 only (SP1 not tested)

Fijate si lo corregís con algo de eso, si no posteá de nuevo.

P.S. "configurar PT con windows XP y que ande bien es toda una proeza"