George:

I cannot tell you exactly what is going on with your code but I had problems embedding a control inside of another, to make the story short, because I was implementing the thing using a bad approach, I basically created an infinite loop, (I had not done that in a while).  Your problem with connections may be something like what was happening to me, if your events run out of control, you end up creating too many connections. 

Anyway, check this post I made recently, in it you will find a URL for a site that has excellent examples on how to embed controls inside of others.  They have live demos there, check them out to see them in action.  They also have the code of course, maybe you can study those to see what is wrong with your code.

Good luck.

Carlos

George:

I don't remember exactly because since then I corrected the code and deleted the erroneous one, but the problem I created was based on misuse of the events of both the parent container and the other bound control inside of it.  I don't remember if I was using on Load or on Binding (or both) but the thing is that the event from the inside control would fire the parent again, and then would run the event for the internal control again, which would then fire the parent again and, you get the point, infinite loop.  If you look at the examples for the site I suggested he basically handles the data binding for the internal control manually.

Carlos