America's Army Punkbuster and Vista

Hi,

I encounter some troubles trying to play with america's army.
Game installation is fine, Punkbuster update run well, but when I try to
connect to a game server I was kick for "Game Hook" ?
Sometime I've got a failed to connect to MSB server just before this
infamous kick ;-)

So I suppose the raison is coming from :
- Security model of Vista
- or Punkbuster compatibility (I've already post a support request to
evenbalance. thx).

Software configuration :

Windows Vista Home Premium Beta 2 Buid 5384
America's Army 2.6
Punkbuster Client version v1.240 A1366

Internet Connection
DSL > 784Kbits

Hardware configuration
Dell Dimension 8300
P IV 3 GHz
1.5 Gbits RAM
120 Gbits HD
FX 5200 128 Mo RAM NVidia Video card



I appreciate any suggestion.
Thx and best regards.
xavier