Add Reporting Services to Trusted Accounts

I installed SQL 2005 SP2 and RS add-in for Sharepoint to a WSS 3.0 site.

I get the error: 'A connection to the server cannot be established' when I try to use the sharepoint account set up for this purpose. It is in the farm administrators, and has the required permissions when I check the database. Are there any other recommended troubleshooting tips that I can do? Thanks.

Dan

FYI - I resolved the problem by adding the account to the local group WSS_RESTRICTED_WPG. This account needs to be in the Local Administrator's group, and the groups starting with WSS.