AutoCompleteManager Implementation

I am trying to build an address search widget and implementing yahoo AutoCompleteManager in it. In one of the similar projects this
feature has already been implemented through an httpService that runs and populates the dataprovider for the AutoCompleteManagerand displays in Textbox of the widget. I am just trying to use that code itself but It is not able to work in my case and I am not able to figure out what exactly I am missing.

I would really appreciate if some one can help me and guide me step wise to figure out the problem.

Thanx

Sonali