installation of B1DESetup in .NET

Hi Gurus,

SAP B1 and .NET is already installed in my system, but when I m trying to open C# B1 Add on Wizard, it is asking for B1DESetup and asking the path, I've tried with B1DESetup_2005SP01_1.3_VS2005 and B1TESetup_2005SP01_2.1_F2.0 but its not working, flashing one error msg "It is not a valid installation pkg for the product".N I m using SAP B1 2005B

Thank you in advance.

Vivek