cannot see AB's radius in viewport [win7] when FumeFX is...

[gakkie]

When we change the OS to win7, our machines cannot see AfterBurn's radius in the viewport (& it's killing me!!)

It is onceagain fine when FumeFX is not installed.
Could you double check wheather it is working correctly(both of them are installed)in Win7?

Windows7 SP1
3dsMax2012 SP2
Afterburn 4.0d
FumeFX 2.1c

Cheers,