BN Server for NAV2009 on SQL Server 2008 Installation Error

kman

During installation of the BN Server for NAV2009 SP1 on Windows Server 2008 R2 with SQL Server 2008 & SQL 2005 Notification Services (Note installation taking place on the same server), I get the following error message "Object reference not set to an instance of an object" .
When I click the OK Button another error message appears with details "Creation of NSInstallPath Registry Key failed".
Once I click the OK button the installation rolls back indicating Installation has failed
What could be causing this? Is SQL Server 2008 (without Notification Services) compatible with NAV2009.

The other option I tried was installing the BN Server on another server within the same domain but the BN Server could not connect to the NAV Server (where the Database & NAV Server reside), this time this was the error message coming up "[DBNETLIB]ConnectionOpen (Connect()).]SQL Server does not exist or access denied." , but i was doing all installations using the domain administrator with super user rights in NA2009 and an adminstrator as well in SQL Server 2008.

How do I install Business Notification Server for NAV2009 on SQL Server 2008?

stryk

Maybe this could help:
http://msdn.microsoft.com/en-us/library/dd354998.aspx
http://www.mibuso.com/forum/viewtopic.php?f=23&t=33328&start=0
http://blogs.msdn.com/b/nav/archive/2009/09/14/microsoft-dynamics-nav-2009-sp1-compatibility-with-microsoft-windows-7-and-microsoft-windows-server-2008-r2.aspx?wa=wsignin1.0