OVS disabled

Hi,

I am trying to apply an OVS search system. I used the same example that is provided on SDN (BAPI_FLIGHT_FETLIST one). I used NWDS 7.1.

But when i deployed the application, then the field which I assosciated with OVS (ie Airlineid) is shown as disabled and moreover the OVS search icon is also not displayed beside it on the Explorer screen. I can however see the OVS icon on the view in NWDS.

Pls help

TIA

Himanshu