请问用vs2008发布程序时，报错，是什么原因
Error 2 An error occurred while signing: Failed to sign bin\Release\app.publish\\setup.exe. SignTool Error: ISignedCode::Sign returned error: 0x80880253

The signer's certificate is not valid for signing.

SignTool Error: An error occurred while attempting to sign: bin\Release\app.publish\\setup.exe pigeon_transfer

Error 1 Cannot publish because a project failed to build. 1 1 pigeon_transfer



------解决方案--------------------
http://groups.google.com.tw/group/microsoft.public.dotnet.general/browse_thread/thread/c3ae2db607ae3346/4881ed0b30463319?lnk=raot&fwc=1