Bing Harvesting Problem In Scrapebox

I am using Bing for harvesting in Scrapebox but was getting low number of harvest links. I checked in
Settings > Harvester Engine Configuration & selected Bing and tested it. It is showing two pages only and than giving error of not found. Any one know how to fix it ? This is the problem why Bing isn't harvesting more links from on keyword. Any help would be really appreciated.

Anybody else facing this issue too?