ASP.Net 1.1 / 2003

I have Google Maps on my website, which works perfect in IE but not in FireFox.  The map initializes and displays the first map (by long/lat coordinates) in FireFox, but then won't change maps after user selects new address.

This is in the Head Section:

function initialize() {
            if (GBrowserIsCompatible()) {
                map = new GMap2(document.getElementById("map"));
                map.setCenter(new GLatLng(43.75, -79.27), 15);
                map.setUIToDefault();
                geocoder = new GClientGeocoder();
            }
        }
        function showAddress() {
            var txtAddress = document.getElementById("<%=Label10.ClientID %>");
            var txtCompany = document.getElementById("<%=Label3.ClientID %>");


            var address = txtAddress.innerText;
            var company = txtCompany.innerText;
            

            geocoder.getLatLng(
                address,
                function (point) {
                    if (!point) {
             //           alert(address + " not found");
                    }
                    else {
                        map.setCenter(point, 15);
                        var marker = new GMarker(point);
                        map.addOverlay(marker);
                        marker.openInfoWindow(address);
                    }
                }
            );
        }

In my .aspx.vb (server side code behind) page, I then call the showAddress function like so,