Tweaking The MTU?

[Cheops]

Hey up

Installed vista beta 1 and I need to tweak the MTU Setting for my network card as it has problems reaching various remote sites.I have an Asus A8N-SLI I have changed various settings in the registry but I can't seem to get the MTU Set to 1458 no matter what I try.

Anyone got any ideas?

Ade.

[Cheops]

well i guess i would be better going back to xp

Thanks

Ade.