Harvester suddenly producing zero or few results

[bobbie2424]

I am using a custom footprint I have used before to harvest sites, but suddenly I am getting either zero results or 2 or 3 blogs - when the same search in google returns 2500 results. I have tried without proxies, so that is not the problem. Also tried google and yahoo with very general keywords and same result.
Any ideas most appreciated

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An update - I saw some other posts about using a bing api - so got one of these and entered it and still get zero results. So basically unable to harvest anything

[bobbie2424]

Further update - just realized posts re bing are quite old and I have used SB since then with good results. I haven't used for about 2 months but can not get any results from harvesting. I haven't changed any settings.