Web based application posts same data twice through SAP BC

Hi All,

I am trying to post data to SAP through SAP Business Connector using BAPI’s & using a web based front end application. While trying to do so, some times, same data is posted twice to SAP. This web based front end application is used to book employee hours into SAP CATS.

It would be of great help if someone can help/provide your valuable inputs on the above mentioned problem.