On my reporting server the Security log shows large numbers of Logon/Logoff events, often 10 or more, when you run pretty much any report in the Report Manager. Is this normal or is it a classic sign of having the wrong setup?

Some system details:

• Windows Server 2003 R2 SP2, virtual server running under VMWare).
• SQL Server 2005 SP3 Standard Edition, running databases, Report Manager, and Ananlysis Services cubes.
• No other major services on the machine (i.e. it's not a domain controller, Exchange server or anything like that).

Any ideas, please, guys?