LOTR battle for middle earth II help!

[Blade3609]

I have a problem with LOTR battle for middle earth II...
I installed the game ,went perfect , movies play well too everything ok except the game itself.. when I play campaign or skimish the background is black with stripes someplaces, all I can see is the units and the buildings(graphics are put at high), when I put the graphics at low the background turns rainbow colors... I can see units and buildings good.. I updated the game ... nothing... I installed the directX feb 2006 , nothing...

I dont know where else to turn...
my specs are:

windows xp x64 edition corporate
intel pentium 4 660 3.6 ghz
direct x feb 2006
ati radeon 9800 pro 128mb..