AJAX replace_html error

I have a query form that performs a complex SQL query based on form params and then creates a bunch of @user_x collections for display purposes. However, AJAX is bombing out with what seems to be a simple error. When I submit the form, instead of replacing the desired partial (under the form) it displays:

Forgot an important part!

FORM VIEW (below form) <% if @users %>   <div id="query_results">     <%= render(:partial => "query_results")%>   </div> <% end %>