Retrieving the COM class factory for component with CLSID : error: 80040111

I am working on migrating 9.3 Arc GIS Engine application to 10.1 Arc GIS Engine application. Everything is working good but at one of the following line(Dim pCalc2 As ICalculator = New ESRI.ArcGIS.GeoDatabaseUI.Calculator()) - I am getting the following message :



Retrieving the COM class factory for component with CLSID {D676066E-38CA-429A-B846-DA7A8446C52D} failed due to the following error: 80040111.

Any suggestions would be helpful.


Thanks.