Do you have a specific error message? What is the schema definition of the Events table? (what are the field types and sizes for each field in the table) Any identity/autogenerated columns? Is there primary key defined?

This article may point you in the right direction... Walkthrough: Exploring COM Interoperability with ATL and Managed Extensions for C++[^]

This happens to me quite a bit.... 1st, make sure in your project properties that the setting to Generate Debug Info is set to true. If it isnt, simply set it to be so an recompile. If it is already true, set it to false, recompile, back to true, recompile. 9/10 that will get my breakpoints working again. Good Luck!