RewriteRule problem

Question

RewriteRule ^([a-z]{2}/){0,1}showCategory/([0-9]*)/[a-z\-_0-9\+]*/mp/(.*)(/{0,1})$ /main.php?id=$2&il[lang]=$1&$3 [L]

RewriteRule ^([a-z]{2}/){0,1}showCategory/([0-9]*)/[a-z\-_0-9\+]*/(.*)/mp/(.*)(/{0,1})$ /main.php?id=$2&il[lang]=$1&page=$3&$4 [L]

RewriteRule ^([a-z]{2}/){0,1}showCategory/([0-9]*)(/{0,1})/[a-z\-_0-9\+]*$ /main.php?id=$2&il[lang]=$1 [L]

RewriteRule ^([a-z]{2}/){0,1}showCategory/([0-9]*)/[a-z\-_0-9\+]*/([0-9]*)(/{0,1})$ /main.php?id=$2&il[lang]=$1&page=$3 [L]

RewriteRule ^([a-z]{2}/){0,1}showCategory$ /main.php?id=0&il[lang]=$1 [L]

I use these lines and localhost/showCategory/ is OK localhost/showCategory/0/1 is OK localhost/showCategory/0/2 stays on the first page...(same 0/1) not good Hhat is the problem?