Nav 2009 R2 3T configuration

Hello all,

first of all I hope all can read between lines :-)

We are trying to install the 3T enviorment with this configuration:
- One server for: SQL SERVER 2008 on Windows Server 2008 R2 Standard
- One server for: NAV Server on Windows Server 2008 R2 Standard
- One server for: Client Windows 7 and Windows XP

All servers are in the same domain group, and we have a domain user that executes Nav Server and MicrosoftDynamicsNavWS.

We try to do step by step these guides, from Nav2009R2 Documentation files:
- Walkthrough: Installing the Three Tiers on Three Computers
- "How to: Configure Web Services with Delegation"

When we try to access web services http://instancename:7047/DynamicsNAV/WS ... y/Services, its impossible, always the browser give us a HTTP 500 error.

We created the next SPN:
- setspn -A DynamicsNAV/NAVSERVER.domain.com:7046 group\user
- setspn -A MSSQLSvc/SQLSERVER.domain.com:1433 group\user

After this, we did it:

"To delegate access to the SQL Server service
Click Start, and then click Run.
In the Open field, type dsa.msc.
This opens the Active Directory Users and Computers utility.
Right-click the node for the domain where you have installed Microsoft Dynamics NAV, and then click Find.
In the Find Users, Contacts, and Group dialog box, type the name of the domain user in the Name field, and then press ENTER.
In the Search results area, right-click the domain user, and then click Properties.
On the Delegation tab, click Trust this user for delegation to specified services only, and then click Use Kerberos only.
There is also the option to not restrict authorization to Kerberos, although the environment is not as secure when you are less restrictive. Your decision must be reflected in the value that you assign to the AllowNtlm setting in the RoleTailored client configuration file (ClientUserSettings.config). For details, see Configuring the RoleTailored Client.
Click Add to open the Add Services dialog box.
Click Users or Computers, and then specify the domain user.
In the list of services for the domain user, click MSSQLSvc, which is the SQL Server service.
Click OK to close the Add Services dialog box. Continue clicking OK to close all open dialog boxes."

Then we found one problem:
- The MSSQLSvc doesn't appear. Where MSSQLSvc are?

We try again to open the url in the browser (I.E.) but its impossible, we always received the same http 500 error.

We need to access the webservices, what are we doing bad?

KR,
Alex.