[Zope] Zope 2.7.3 adding existing products

Hi, Over the past few versions, I have been able to add the following products to my installation ZMySQLDA ZODBCDA I would add them into the C:\teched-lp01\lib\python\Products path. Zope 2.7.3 is different. When I put them in the C:\Zope-Instance\Products or the C:\Zope-2.7.3-0\lib\python\Products the runzope ends. If I remove them Zope starts up. I am running Zope under Windows XP SP2. My Zope 2.6.1 works fine. I google around but I did not see pointers to this issue. Thanks, Larry