Ajax Calender Extendor Control is not working

 Dear Sir/Mam,

                 I have created one  web page for registration information.It contains two AJAX Calender Control.
 In web Page one calender control working fine but another is not working properly.I used AJAX  dll 3.0.20229.0 version.   
 I removed that calender control and once again created another calender control,but still its not working. 

                 Please give me solution as soon as possible.

Thanks in advance

     Pradip