We have a VB application developed in Visual Studio 2005 that references:

CrystalDecisions.CrystalReports.Engine v. 12.0.2000.0
CrystalDecisions.Enterprise.Framework v. 12.0.1100.0
CrystalDecisions.Enterprise.InfoStore v. 12.0.1100.0
CrystalDecisions.ReportSource v. 12.0.2000.0
CrystalDecisions.Shared v. 12.0.2000.0
CrystalDecision.Windows.Forms v. 12.0.2000.0

This application originally used ADO to connect to our SQL Server database. I recently converted to a SQL connection so I can take advantage of table-valued parameters in SQL Server 2008. After the conversion, some of our Crystal Reports now take up to 3 minutes to load (every time, not only the first time), but only on some users PCs. Prior to the change, the reports only took a matter of seconds, and they still take only a matter of seconds on my development PC. We have looked at all the settings we can think of on the slow PCs but so far have found no smoking gun. Has anyone else experienced this issue? Does anyone have any suggestions for how to find the problem?