I inserted a button advanced in a website (asp net vs 2013 Community), when I build the Project I get 2 errors : Error 1'ButtonAdv' είναι ασαφές στο χώρο ονομάτων (is uncertein in the space of names) 'Syncfusion.Web.UI.WebControls.Shared'. C:\Users\supervisor\AppData\Local\Temp\Temporary ASP.NET Files\root\643b2d15\5a089491\App_Web_4m1nv5nm.0.vb 537
2nd) Error 6 'ButtonAdv' is ambiguous in the namespace 'Syncfusion.Web.UI.WebControls.Shared'. C:\Users\supervisor\Documents\Visual Studio 2008\WebSite1\WebSite1\Default.aspx 1 1 WebSite1(1)
set target framework 4.51