Cordova keyboard plugin isnt working

Maybe I am doing something wrong but I want to show the keyboard once an input field is in focus.
I was able to focus the input field by using some solution that someone posted in one of the ionic issues.
once the control is in focus I am calling the following;
I also added on my config.xml file the following preference “KeyboardDisplayRequiresUserAction” value="false"
I am running my app inside the ionic viewer that based on the ionic viewer documentation supports this plugin.
I will really appreciate some help here.
thanks in advance.