Consuming Attendance API

Consuming Attendance API

Hi, I tried consuming attendance API in my .Net Application,to post the check-in and check-out time of employee with the generated AUTH Token.But,I received the below error.

The remote server returned an error: (500) Internal Server Error

Below is the URL:

https://people.zoho.com/people/api/attendance?authtoken=<authtoken>&dateFormat=09/09/2013 18:45:13&checkIn=09/09/2013 09:30:45&checkOut=09/09/2013 18:45:13&empId=<empid>