Is it the right screw? I appreciate the attention to the obvious. It is amazing how often an electrical appliance problem can be fixed by simply plugging it in. However, in this case, not only and I sure it is the right screw... it is the only screw provided.
As to filing, yes that of course is an option. But, even if I weren't tired of modifying brand new products to make them work as promised, I do not need o "file it to length". I am going to have to file the head of the screw. The screw is not too long. The head is too thick. I am not even sure that the slot in the head is cut deep enough to take the needed metal off and still have a slot. The screw is started from inside the receiver and it is the head of the screw that is blocking the action. I have enough projects at the momment and an hoping Weaver will provide the proper screw when they all get back from vacation on Mon.
Thanks for the responses. Have a great 2010.