All - As was suggested by a couple of posters, this problem was solved by adjusting the random delay between queries. I used a minimum of 5 secs and a maximum of 15 and once again, I am using Advanced Web Ranking. You have to click the "BE NICE TO SEARCH ENGINE" box first. Of course, this dramatically increased the amount of time required to run the report but at least the entire company does not get upset with me for getting Google and Yahoo mad at us. Also, I did not use the API keys for Google or Yahoo. Thanks to everyone for the input!