Hello,
You are requested to refer to the following links and see if it helps you with your issue. In the links, you will also find the sample provided by one of our engineer :
http://our.componentone.com/groups/topic/examples-of-activereports-displaying-ls-application-data/
http://our.componentone.com/groups/topic/using-a-preloader-when-report-loads-in-lightswitch-form/
Please run the same at your end and see if you face the same issue with this sample as well.
Also, it would be really helpful if you could share with us the exact version of the control used by you. And if not using the latest build, please download it from the following link and test with it :
http://our.componentone.com/groups/topic/activereports-7-service-pack-2-build-7-2-7725-0-released/
In case the issue perists, we would request you to share your sample application with us.
Regards,
Mohita