NI SIT Blocks library missing in Simulink library browser

Hi, We are working on interfacing Simulink Model with Labview via Simulation Interface Toolkit (SIT) server. Read many online forums about this and everywhere its mentioned that we require to place Signal Probe block in our model from NI SIT Blocks library to interface with SIT. But NI SIT Blocks library is not present in simulink library browser. We are using Matlab 2010b, Labview 2011 and SIT 2011.

Please suggest how to make the simulink model to communicate with labview.

Thanks!