Error: 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: CS0030: Cannot convert type 'ASP.login_aspx' to 'System.Web.UI.WebControls.Login' Source Error: Line 120: public login_aspx() { Line 121: string[] dependencies; Line 122: ((Login)(this)).AppRelativeVirtualPath = '~/login.aspx'; Line 123: if ((global::ASP.login_aspx.@__initialized == false)) { Line 124: global::ASP.login_aspx.@__stringResource = this.ReadStringResource(); Description: If (a) You use 'Form authentication (<authentication mode='Forms'>)' in your ASP.NET 2.0 web application; and (b) make the 'loginUrl', 'Login.aspx' (with Capital 'L') (<forms name='xxxxx' loginUrl='~/Login.aspx'>); you will encounter the above error when the web application request for login. When you 'Start' your web application on local machine (Using F5 or Ctrl+F5), there is no problem. But when you publish the web-application on the remote web-hosting server, with the setting 'Allowed this precompiled site to be updatable (checked)' and with a web form called 'Login.aspx', you encounter the error: <<Cannot convert type 'ASP.login_aspx' to 'System.Web.UI.WebControls.Login'>> Cause: So, the problem is obvious: Login.aspx page (with capital 'L') has a relative class called 'Login' that conflicts with 'System.Web.UI.WebControls.Login'. This bug was reported sometime ago (/connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=102543) but it seems that Microsoft has not fixed it. I have already (6 June 2007) encountered this error on www.discountasp.net web-hosting. Solution: Of course this is a bug in .net framework and ASP.NET 2.0 and should be fixed by Microsoft, but there is some workarounds that you could use one of them: <ul>[*]W1- Do not check 'Allowed this precompiled site to be updatable' while publishing if you have 'Login.aspx' page! [*]W2- Do not entitle your login page 'Login.aspx'! Call it 'login.aspx' (without capital 'L') or 'logon.aspx' or something else (remember to make necessary changes in your web.config file). [*]W3- Just rename the class in code-behind of 'Login.aspx' (solution for advance developers).<ul>/ul>[/list]