I have url connection, which normally works fine

NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request
                                                              delegate:delegate];

But when I create a modal window, no request ever receives response:

[NSApp runModalForWindow:window];

If I comment this line out, thus creating a 'standard' window, everything works.

I tried implementing all methods from NSURLConnectionDelegate, not a single of them called.

I suspect this is something about 'run loops', but have little experience in this area. Does anybody have experience in this?

Thank you