When I harvest urls, should I only be using google or yahoo and bing as well. I bought 10 semi ded proxies and I can't harvest anymore urls with google after harvesting about 5000. I checked my proxies and they all work so I am confused what is going on? Out of curiosity I tried yahoo and that didnt work too, but Bing works extremely well. My settings are 1 connection with Google and 3 for both yahoo and bing. RND timeout is 5 secs. Any advice would be much appreciated. Thanks.