NIS 2010 not working with Thunderbird v3.0

I had NIS 2010 installed previously and it worked just fine with TB v2.x; yesterday I reinstalled NIS 2010 after I had upgraded TB to v3.0.

 

NIS 2010 works ok other than that it does not seem to recognize TB v3.0 nor are there any NIS icons in TB unlike in the past.

 

Anyone else experiencing this?