[Koha] Problem in connecting to z3950 server

 Dear All In the cataloguing when I click the "z39.50 Search" button a pop up window appears that says "Z39.50 Search Points" at the top and has a few fields to fill out with search terms like "Title:" and "ISBN:" and a few "Search targets" at the bottom, of which the LOC target is checked. When I search anything, however, the search fails and we can tell from the browser pop up window that the browser is looking at the local host (127.0.1.1). After a short while a message appears that says: "Connection failed to z3950.loc.gov" Can anyone tell us what we need to do or point us to a page that can help us to connect to z3950.loc.gov? Sushant