Actually I just download the VB version and do nothing change on it, however once I open the scheduerDBProvider class, it already shown me the error as show in the picture below, of course compiliation will give me the similar error.
Beside this, i also saw some error in Insert, Delete, Update and GetAppointment function. I attached another screen shot here. Is this caused by this version of Telerik? I am using Telerik.Web.UI.dll, version 2012.2.713.20
Your help is very much appreciated, as I totally stuck to support multiple appointments. Thanks