AJAX and Mixin events

Hi,

I am trying to create a mixin for geocoding user input and displaying it
on a map.

As suggested in previous questions in the forum, I implemented a mixin.

In my template (listing/AddListing.tml) I have:

<t:textfield t:id="addressLineOne" t:mixins="OpenStreetMaps"/>

In my component class, I have:

Object onGeocodeAddressFromAddressLineOne(String input) {
// Need to return JSON here
logger.debug("********* returning JSON data******");
logger.debug("*********Input recevied as*********" + input);
return null;

and in my mixin class I have:

private static final String GEOCODE_REQUEST_EVENT = "geocodeAddress";
Link eventLink = resources.createEventLink(GEOCODE_REQUEST_EVENT);

And there is some javascript that waits for "change" event on the text
fields and fires an AJAX request.
Now, everything seems to be working - when I enter text in the field, It
triggers the AJAX request.
However, the AJAX request fails with HTTP 500 (internal server error) and I
picked up following the logs:

[ERROR] TapestryModule.RequestExceptionHandler Processing of request failed
with uncaught exception:
org.apache.tapestry5.ioc.internal.OperationException: Request event
'geocodeaddress' (on component listing/Add:addresslineone) was not handled;
you must provide a matching event handler method in the component or in one
of its containers. [at
classpath:com/dukstra/travelnet/web/pages/listing/AddListing.tml, line 31]
org.apache.tapestry5.ioc.internal.OperationException: Request event
'geocodeaddress' (on component listing/Add:addresslineone) was not handled;
you must provide a matching event handler method in the component or in one
of its containers. [at
classpath:com/dukstra/travelnet/web/pages/listing/AddListing.tml, line 31]

I tried adding the @OnEvent(value="geocodeaddress" and
component="addressLineOne") to the event handle above, but its still
failing.

Can't seem to figure out whats wrong? Would appreciate any help.

Best Regards,
Sanket