setup error in c#

[C# Programming]

Hi,

i want to make setup my project in c# but i have this error


Error 27 File 'log4net.dll' targeting 'AMD64' is not compatible with the project's target platform 'x86' C:\Users\user\Documents\Visual Studio 2010\Projects\WindowsFormsApplication3\Insurance Management Setup\Insurance Management Setup\Insurance Management Setup.vdproj Insurance Management Setup

Also i want to be run the setup in 32 bit and 64 bit platform

What is the solution ??