Antifreeze leaking from thermostat

What is your question?

I just replaced the termostat on my 2001 Ford Windstar. When I started pouring new antifreeze in it, it is leaking out right around the thermostat. Took everything apart to guarantee thermostat was in place. It is installed correct and gasket is in place. Why is it leaking still?

What makes this problem better or worse?

adding antifreeze, driving any distance

How long has your 2001 Ford Windstar had this problem?

1 day