A little background and system configuration might help.
I have installed BiDiBLAH on a XP Pro system running in VMWare. I have .NET 1.1 and 2.0 installed. I have installed the RawPacket NDIS Protocol Driver and rebooted. I have WinPcap 4.0 beta 2 installed. I have configured the VMWare networking to run "Host-only" so that I have an isolated network environment with two other systems. I have configured the "Destination MAC" to be the default gateway for the VMWare network gateway. I can ping all hosts on the network and I have disabled the Windows Firewall all other firewalls on the system. I do have Free AVG Anti-virus running (don't think that matters but who knows).
I have tried and looked into everything. I have also Googled with no results other than the tutorial Making Testing Easier With BiDiBLAH http://www.ethicalhacker.net/content/view/20/24/.
Any help would be appreciated.