Database login failed after upgrade to VS 2008

Question

I am having trouble with one of my reports after upgrading a project from VS 2005 to VS 2008. All reports work fine except for one. The one that doesn't work has a subreport and I am assuming that the subreport is the cause of the problem.
My configuration is  - using Crystal Reports Professional XI  (11.5.8.826)
The web server has Crystal reports server install, but I know very little about it. When I installed it, I had so much trouble configuring it, I don't know what it is that I finally got to work on the server. I think I ended up installing one of the runtimes a while back to get it working.
When I upgraded my project, I simply opened the project in VS 2008, set the target as .net 3.5, built it and everything works except for this one report.
Can someone please tell me what I need to install, or change on the server to make this work properly?
Is there a way that I can determine how my reports are being served up? As I said, I'm not very familiar with the CR server and I had a lot of trouble with it when I did the initial configuration.
Thanks

Answer 1

Thanks for the reply. I got the upgrade complete, but I am still getting the database logon error.  I am using Visual Studio 2008, C#, Crystal Reports 2008 (dll version 12.0.2), Sql Server 2000. All of my reports work fine except for this one. The difference in this one is that it has a subreport. The report and subreport are using stored procedures. I have tried using the sa account to login to them. They login to two different databases on the same database server.
Here is the code that I am using to login to the database.
public enum ReportDatabase{MGA, Brokers, Intranet, TimeClock };
        public void SetDBLogonForTables(Tables tables, ReportDatabase database)
            string _userid = string.Empty;
            string _password = string.Empty;
            switch (database)
                case ReportDatabase.MGA:
                    _userid = "abc";
                    _password = "123";
                    break;
                case ReportDatabase.Brokers:
                    _userid = "abc";
                    _password = "123";
                    break;
                case ReportDatabase.Intranet:
                    _userid = "abc";
                    _password = "123";
                    break;
                case ReportDatabase.TimeClock:
                    _userid = "abc";
                    _password = "123";
                    break;
            ConnectionInfo _connection = new ConnectionInfo();
            _connection.ServerName = "123.123.123.212";
            _connection.DatabaseName = database.ToString();
            _connection.UserID = _userid;
            _connection.Password = _password;
            foreach (Table table in tables)
                TableLogOnInfo _logoninfo = table.LogOnInfo;
                _logoninfo.ConnectionInfo = _connection;
                table.ApplyLogOnInfo(_logoninfo);