BT 2006 and SharePoint Adapter - can't enable

Hi all,

I'm running BizTalk 2006 Standard Edition (not the R2 version) along with 
MOSS RTM (not SP1) on my virtual PC running Windows Server 2003 (SP2).  I 
need to use the BT SharePoint Services adapter now, but when I go to 
Add/Remove Programs and try to modify the BT components to add the Windows

SharePoint Services Adapter Web Service, the selection is grayed out. 
When I 
click on it the Description window says "At least one of the prerequisites

for this feature is not installed".  I assume I need this in order to
receive 
do***ents from a SP doc lib into my BT receive pipeline.
Does anyone know what this prerequisite might be?  I'd really like to use 
this so any help would really be appreciated.


Thanks ahead of time,
Kevin