web deployment project reference - vs2008   

Hi all,

I have a solution in VS2008 with the following projects:-

Website1
WebDeployment1
Website2

WebDeployment1 is a web deployment project for website1. I want to add a 
project reference to WebDeployment1 in Website2, but for some reason 
WebDeployment1 does not show up in the Add Project Reference dialog window 
as an option. ANy ideas why?

TIA!

date: Tue, 4 Mar 2008 23:36:03 -0600   author:   am