Seo Problem Because Of?

hello i own a website http://wall-pack.com/ it is not leading on chosen keyword and can google webmaster tools
Crawl errors be the reason of it because i do not know why i'm not leading have backlins even friend told me that he used half of that backlinks and got leader website is working everything is ok but
Crawl errors are showingcan someone suggest something or help me how can not found be 281 if i only have 29 posts?
Crawl errors

HTTP 8
Not found 281
Soft 404s 10
Unreachable 2
Updated Jan 2, 2012

 

Any Ideas Someone?

 

Hey folks! Can someone please share their experience with GEORGEGeek on this?