DXDiag fails. (DirectPlay)

When I run dxdiag, it crashes on DirectPlay and when I re-open it, it says there was a problem accessing directplay last time and asks me if I would like to bypass it.
Anyone know why this is?
Nvidia 8600GTS 512MB latest drivers. Q6600 and 2GB RAM.
DX 9.0c latest version.
Cheers.
Anyone know why this is?
Nvidia 8600GTS 512MB latest drivers. Q6600 and 2GB RAM.
DX 9.0c latest version.
Cheers.