大跌眼镜哉，,htacess怎么重写都无效

[ISAPI_Rewrite]# 3600 = 1 hourCacheClockRate 3600RepeatLimit 32# Protect httpd.ini and httpd.parse.errors files# from accessing through HTTP# duoduo Rewrite规则RewriteCond Host: (.*)stu80\.com$RewriteRule (.*) http\://www\.youyax\.com [R,I]RewriteCond Host: ^www\.stu80\.com$RewriteRule (.*) http\://www\.youyax\.com [R,I]RewriteCond Host: ^youyax\.com$RewriteRule (.*) http\://www\.youyax\.com [R,I]RewriteRule ^/forum/((Index|List|Content|admin|Vote|Message|Favor).*)$ /forum/index\.php/$1 [L]RewriteRule ^/m/((Index|List|Content|admin|Vote|Message|Favor).*)$ /m/index\.php/$1 [L]

RewriteEngine On#rewriteCond %{http_host} ^stu80\.com [NC]#rewriteRule ^(.*)$ http://www\.youyax\.com/$1 [R=301,L]#rewriteCond %{http_host} ^youyax\.com [NC]#rewriteRule ^(.*)$ http://www\.youyax\.com/$1 [R=301,L]RewriteRule forum/((Index|List|Content|admin|Vote|Message|Favor).*)$ /forum/index.php/$1#RewriteRule ^/m/((Index|List|Content|admin|Vote|Message|Favor).*)$ /m/index\.php/$1 [L]