404 Webmaster Response Code

Store Builder Questions
1

I've got multiple 404 response code urls in my web master tools so Ive been adding re direct code to the .htaccess file as follows


301 Redirects

301 Redirect 1

RewriteCond %{QUERY_STRING} ^$

RewriteRule ^about-us.html$ /about-our-company.html? [R=301,NE,NC,L]


301 Redirect 2

RewriteCond %{QUERY_STRING} ^$

RewriteRule ^wood-venetian-blinds$ /wooden-blinds/? [R=301,NE,NC,L]



but the old url's are not being re directed.



Have i got the code wrong?