Hi, 
  
Thank you for response. Actually they haven't given any files, When we try to connect the DVR using IE, the browser will try to download a Cab file from the DVR server, which contains the ocx and few DLLs. 
  
The ocx is called HiDvrOcx.ocx. I will mail you the files, coz it is more than 200kiB, not allowed to upload here. 
  
Regards 
Thomas