Pass Multiple Values With GetLocations Function

I have the data of every user inside an XML file, such as address, username, email etc. I want to add markers to the map depending on the address and I want every marker to display a info window with data of the user in that location. The problem is that I get an error when I try to pass the other data with the getLocation method of the geocode. The markers are displayed in the map but the data in the info window aren't.

Code:
GDownloadUrl("mysql_to_XML.php", function(data) {
var xml = GXml.parse(data);
var markers=xml.documentElement.getElementsByTagName("marker");
for (var i = 0; i < markers.length; i++) {
var username = markers[i].getAttribute("username");
var email = markers[i].getAttribute("email");
var address = markers[i].getAttribute("address");

geocoder.getLocations(address, getCoordinates(email, username));
}});
function getCoordinates(response, email, username) {
place = response.Placemark[0];
//Retrieve the latitude and longitude
point = new GLatLng(place.Point.coordinates[1],place.Point.coordinates[0]);
var marker = createMarker(point, username, address, email);
map.addOverlay(marker);
}