程序运行错误问题(大家指教)

自己用VS2005做了一套后台程序,在本机上运行(不论是IIS还是在VS2005)都正常,可是打包发给别人后,出现错误
自己弄了 很久,解决不了,大家帮忙,谢谢


Server Error in '/' Application.
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Compilation Error
Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.

Compiler Error Message: CS0246: The type or namespace name 'ToEmpire' could not be found (are you missing a using directive or an assembly reference?)

Source Error:

Line 9: using System.Web.UI.WebControls.WebParts;
Line 10: using System.Web.UI.HtmlControls;
Line 11: using ToEmpire.Data;
Line 12: using ToEmpire.Web;
Line 13:

Source File: d:\web\boya\manage\Login.aspx.cs Line: 11