Yahoo Messenger no longer auto-reconnects. What's up?

I tried downloading a fresh copy, too. Used to be, whenever my connection went down, Yahoo Messenger might sign out, but then, it'd sign back on, on its own. Now, for the last couple months, it just sits there, waiting for me to click "Sign On". I was on DSL for awhile. It changed behaviors DURING my DSL customer stint. That is to say, this happened, WHILE I was still a DSL user: the messenger quit automatically signing on when the connection dropped and then quickly reconnected. Okay? Now that I'm a cable customer, the same thing happens. When the connection drops and then quickly reconnects, the messenger doesn't automatically logon by itself. It waits for me to click "Sign On". I hadn't changed any options...

I already have Yahoo Messenger set up to start automatically at system boot (which I do daily). Does anyone have any suggestions as to what I may do further to get Yahoo Messenger to reconnect automatically when there's a blip in the connection?