Crystal Reports Deployment

Question

My .NET application has 2 crystal reports which are passed data from Sql Server via datasets in code. The problem occurs once the application is deployed to the end user machine (Win2k Prof). When the user attempts to open a report the windows installer starts as if it is going to re-install the application. When the installer finishes, the report loads up and shows it's data perfectly. If the user then closes the report and opens it again the installer does not appear. However, when the application is closed and reopened the installer will launch again when the user attempts to view a report. I have included all the relevant CR merge modules and MDAC 2.7 in my deployment and also VC_User_STL71_RTL_X86_---.msm and VC_User_CRT71_RTL_X86_---.msm merge modules as required by Crystal. I have essentially followed the instructions in crnet_deployment.pdf to the letter. I have also tried using MDAC 2.8. I have tried installing the application logged into the user machine as admin and also logged in as an end user (restricted registry access) by entering an admin password when the installation starts. Both result in the same problem. Any ideas would be gratefully appreciated.... S.