woocommerce product page 404 on lighttpd

I use the lighttpd and fastcgi on my web sever, but when i install woocommerce, open a product
page, it will show 404 error;

my product page link would show :

https://mysite.com/index.php//product/sample/ ?

this is my rewrite url:
url.rewrite-final = (
# Exclude some directories from rewriting
“^/(wp-admin|wp-includes|wp-content|gallery2)/(.*)” => “$0”,
# Exclude .php files at root from rewriting
“^/(.*.php)” => “$0”,
# Handle permalinks and feeds
“^/(.*)$” => “/index.php/$1”
)