Events not firing if using CrystalReportViewer in design?

Question

 when I am using Crystalreportviewer in design file, then Events of Dropdownlist and TextBoxes are not firing. Please help me.

  

<CR:CrystalReportViewer ID="CrystalReport1" runat="server" AutoDataBind="true" /> 

 

  if i am comment this one.events are working fine. give me reply ASAP.