Why does this error say this literal doesn't exist?

I'm getting an error that says:
'System.Web.UI.WebControls.Login' does not contain a definition for 'ltrlFailureText' and no extension method 'ltrlFailureText' accepting a first argument of type 'System.Web.UI.WebControls.Login' could be found (are you missing a using directive or an assembly reference?)
Error 1 'System.Web.UI.WebControls.Login' does not contain a definition for 'ltrlFailureText' and no extension method 'ltrlFailureText' accepting a first argument of type 'System.Web.UI.WebControls.Login' could be found (are you missing a using directive or an assembly reference?) C:\Users\x\Documents\Visual St ...