Canot browse metadata beacuse DECS

Hi All, I am using notes6.5.1. And i am using Data Connection.

After clicking on New Data Connection resource.

When i m clicking on BROWSE METADATA.

Its Showing a error

“CANNOT BROWSE THE METADATA BECAUSE DECS IS NOT RUNNING ON THIS SERVER”

How i will run the decs in server. Or What i will do so that i will able to use DECS

Please guide me