Invisible Jerseys Help

Hi, I have a problem with invisible jerseys when I play at high player detail, they vanish and I can see through players...

I run AMD Phenom II X4 940 3.0
4gigs of ram
geforce 250 gts

With those setting everything ran fine on high with 70 fps and no vanishing jerseys...

I added 2 more gigs of ram to bring me to 6 gigs, it gave me a 10 fps boost but I get this jersey problem...

How can I fix?

CLOTH_LOGICAL_THREAD_0 = 1
CLOTH_LOGICAL_THREAD_1 = -1
CLOTH_LOGICAL_THREAD_2 = -1
CLOTH_LOGICAL_THREAD_3 = -1

What should I change those too in the config file?

Help me if ya can...