Of course I set a breakpoint there. That's in the Debugging101 course. The problem is that when I put a breakpoint in the setSource function, all I see is that the DataMemeber is set okay, but when the DataSource is assigned, its value doesn't change, and the value of DataMember if set to "". I actually managed to solve this specific problem, by calling the setSource function only after the control was added to the form. However, I did encounter the same problem somewhere else in the application, when I tried to add more clocks.