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Hi Guys, Searched the web in an answer to the importance of crawl errors in Webmaster tools but keep coming up with different answers. I have been working on a clients site for the last two months and (just completed one months of link bulding), however seems I have inherited issues I wasn't aware of from the previous guy that did the site. The site is currently at page 6 for the keyphrase 'boiler spares' with a keyword rich domain and a good onpage plan. Over the last couple of weeks he has been as high as page 4, only to be pushed back to page 8 and now settled at page 6. The only issue I can seem to find with the site in webmaster tools is crawl errors here are the stats:- In sitemaps : 123 Not Found : 2,079 Restricted by robots.txt  1 Unreachable: 2 I have read that ecommerce sites can often give off false negatives in terms of crawl errors from Google, however, these not found crawl errors are being linked from pages within the site. How have others solved the issue of crawl errors on ecommerce sites? could this be the reason for the bouncing round in the rankings or is it just a competitive niche and I need to be patient? Kind Regards Neil