Kerberos; SetSPN; Issues with Reporting Services on SQL2005

We created an HTTP endpoint on our SQL2005 system.

(So we can send WebService responses from our client apps, directly to the database)

Following the BOL, "Configuring the HTTP Kernel-Mode Driver (http.sys)"

We setup the accounts using the described SetSPN.exe method

setspn -a http/server domain\serviceaccount

setspn -a http/server.domain.company.com domain\serviceaccount

Endpoints work fine.

But now... We have an issue connecting to the Reporting Services

If we connect via: http://servername/Reports$Instance

We get prompted for Security information, and ultimately page not authorized.

If we connect via http://ipaddress/Reports$instance

We get prompted for Security information, but do get to the Reports Home page

If we undo the SetSPN (via -D); Reporting Services work with no security prompting, and both via server name and IP. BUT, endpoints stop working.

When we have the SPNs enabled, we get an error in the error long on the client side:

The kerberos client received a KRB_AP_ERR_MODIFIED error from the server host/server.domain.company.com. This indicates that the password used to encrypt the kerberos service ticket is different than that on the target server. Commonly, this is due to identically named machine accounts in the target realm (domain.company.com), and the client realm. Please contact your system administrator

I have tried removing the system from the domain, deleting the account, and readding it. No fix. I have tried a few others (based on searches), nothing has changed.

It has something to do with the SPNs , but I just can't figure out what the right combination of settings would be to allow endpoints and reporting services on the same system.