defined in multiple places; using definition

Hi Guys,

I am having an ASP.NET project whose build sucessed but while runing the application i am geting following error

CS1595: 'epm.Main' is defined in multiple places; using definition from 'c:\WINNT\Microsoft.NET\Framework\v1.1.4322\Temporary ASP.NET Files\epme6.5\5dab944c\8476dd15\assembly\dl2\e5ab45ea\00302640_cd74c601\epmj.DLL'

any body have any idea about the solution of this problem or some kind of workaround or any refrence.

Thanks

Mahesh