New MacBook Pro WinXP PTLE under bootcamp issues

[smlamb]

Just received my flash new 2.4 15" Macbook Pro. I have PTLE 7.1.1 working perfectly in Mac OSX 10.4.9, playing full 32 track sessions down at 64. But I'm having no luck with the same installation under Win XP in a BootCamp partition on the MBP. Can barely get sessions playing at 512 and 1024 - anything lower and I'm plagued by 6083, 9093 and 6085 errors. Movement of meters and transport counter/clock graphics is very jerky and not as responsive and as fluid looking as it should be. Also tried using WINXP PTLE 7.3.1 and experienced the exact same issues.

My setup: MBPro (2.4ghz, 2g RAM, June 07 model), Win XP Pro SP2 using Bootcamp, OWC FW800 drive through SIIG ExpressCard/34, Digi 002R, PTLE 7.1.1/7.3.1

I used the Mac drivers disk that Bootcamp creates to install all the drivers in WinXP... I wonder if there might be a conflict with one or more of these drivers?

any ideas? anyone had any better luck with a PTLE 002R under WinXP on the Macbook Pros?

Help please! thanks!

Simon