There seems to be a bug with CRM 3 where the install doesn't correctly finish (although you aren't told this) and thus you are unable to make System Setting changes in the CRM 3 admin area.
I've just been talking to a guy a Microsoft and the follow fixed our problem.
Hi Michael,
Thanks for the update. I will close out this incident and mark it resolved. On the settings problem, I will offer one solution. If this doesn't fix it then you will need to continue troubleshooting through the newsgroups:a. From the default website where SRS is installed browse the reports directory (http://YourSRSserver/reports)
b. Click Properties then click Your_Org_Name_mscrm folder
c. click the Security tab
d. The following groups should be added:
BUILTIN\Administrators with a role ofContent Manager
DOMAINNAME\ReportingGroup {ec70ac7b-a091-4d00-b038-75fd6ea0e84c} with a role of Browser for Microsoft CRM
NT AUTHORITY\NETWORK SERVICE with a role of Publisher for Microsoft CRM
In our case we needed to add NT AUTHORITY\NETWORK SERVICE