[Boost-users] How to reduce the size of a output DLL file?

I used to build a DLL file with VS2005 & boost-1_33, the project used boost::thread, asio, serialization, filesystem, datetime,system, link static, /MT, and the output DLL file size is about 1.7M. Now I port the project to VS2008 SP1 with boost-1_36, but the output file size increase to 2.9M! The VS2008 DLL project just default setting. I do not know whether this problem is boost-1_36 OR vs2008. Can some one give me some tips for how to reduce the DLL out put file size? -- Best regards, aster