We've noticed some issues with dynamic parameters with some databases (MySQL specifically) in Crystal Reports 2008 and, because Logicity 1.6 is built with the Crystal 2008 SDK, the same problems are carried over to Logicity. We've been searching for a solution to this and, in the meantime, are recommending users experiencing this issue to remain on the last version of Logicity 1.5 (available in the 'Old Versions of Logicity' folder) which was built with Crystal XI.
Let me know if you see the problem resolved under Logicity 1.5.
Thanks,
Adam