can not see custom .NET Framework data provider in Report Builder's connection type, but can see in SSRS

I am using SSRS 2012.

I have U2 Data Server Provider for .NET( .NET Framework data provider ).

I have followed this link to register U2 Data Server Provider for .NET( .NET Framework data provider ) .

http://technet.microsoft.com/en-us/library/bb326409.aspx

See screen shot of SSRS and Report Builder.

My question is:

How to populate U2 Data Server Provider for .NET in Report Builder's connection type?

Rajan