better tag cloud plugin/widget

I have installed the Better tag cloud widget.

I wanted to show tags given to a custom post type named ‘dialog” on my home.

I have tried using the placement shown on the developers website, and I have used a widget. In the widget I have given my taxonomy name in the field for this.

But no tags show up. My custom post time does have the post_tag option and the category option.

What can I do to show the tags for my custom post type only ? I read this plugin would work, but I much rather would want to use my own wp-query for this, the plugin seems buggy somehow.

what would be the solution ?