LinkAssistant wrote:

It looks like Blekko blocks IP addresses for a longer time than other search engines. Please use a proxy in Preferences -> Proxy settings or Preferences -> Search safety settings -> Proxy rotation, that will let you change the querying IP address and start getting results again.

Thanks for your response.
I have been doing what you suggested ever since I have been having the problem. I have been trying without any success.
I have also been doing a little experiment with my own website and have noticed a drastic change. When I started using this software in demo mode, I was getting over 1,000 backlinks in excluding duplicate mode. Ever since I purchased this software,my backlinks as of this writing has shrunk to a mere 154. I have been working hard trying to place backlinks from responding to blogs, newspaper articles, even writing articles on squid. Wherever I see an opportunity to place my URL I take that opportunity. I even got into a University site the legal way.Today, all my backlinks for news vine.com. disappeared. My backlinks for the paid Yahoo directory listing and other Yahoo listings is gone, I had about two backlinks with page ranks of 10, that;s gone, I had about 4 backlinks with 9's lots of 8s 7s, they have gone.
I have also noticed that the proxies does not remain alive for long. It's either dead or timed out. I have had backlinks in India and they don't even show up. Google does not even show it. I am beginning to think that this back link and page ranking is a big racket.
Could someone give me a reasonable explanation. I have not been saving my logs so I do not have any to give you for analysis. I will start saving them from today on.
http://izteremka.com/