Ajax Scaffold Generator Ajax Scaffold

I have one controller using scaffolding extensions plugin to manage all my models. However, I want to use ajaxscaffold plugin to manage one particular model (“Stage”). The moment I install ajax scaffold plugin and restart the app, my old controller fails in “Create New Stage” action.

NoMethodError in Crud#new_stage

Showing vendor/plugins/scaffolding_extensions/scaffolds/new.rhtml where line #3 raised:

undefined method `content_columns’ for #<stage:0×49b7bd0>

Extracted source (around line #3):

1: <h1>Create new <%=></h1>
2:
3: <%= scaffold_form>@scaffold_class.scaffold_new_fields) >
4:
5: <= manage_link>