Hi,

There is a post about this somewhere here. You have to edit your rules and replace /_ or \_ with just the underscore, because IIS does not need the escape character (the slash) and it confuses it.

Good luck

RewriteRule ^pg\/([A-Za-z0-9\_\-]+)$ engine/handlers/page_handler.php?handler=$1&%{QUERY_STRING} [L]
RewriteRule ^pg\/([A-Za-z0-9\_\-]+)\/(.*)$ engine/handlers/page_handler.php?handler=$1&page=$2&%{QUERY_STRING} [L]
RewriteRule ^tag\/(.+)\/?$ engine/handlers/page_handler.php?handler=search&page=$1 [L]
RewriteRule ^action\/([A-Za-z0-9\_\-\/]+)$ engine/handlers/action_handler.php?action=$1&%{QUERY_STRING} [L]
RewriteRule ^cache\/(.*)$ engine/handlers/cache_handler.php?request=$1&%{QUERY_STRING} [L]
RewriteRule ^services\/api\/([A-Za-z0-9\_\-]+)\/(.*)$ engine/handlers/service_handler.php?handler=$1&request=$2&%{QUERY_STRING} [L]
RewriteRule ^export\/([A-Za-z]+)\/([0-9]+)\/?$ engine/handlers/export_handler.php?view=$1&guid=$2 [L]
RewriteRule ^export\/([A-Za-z]+)\/([0-9]+)\/([A-Za-z]+)\/([A-Za-z0-9\_]+)\/$ engine/handlers/export_handler.php?view=$1&guid=$2&type=$3&idname=$4 [L]
RewriteRule xml-rpc.php engine/handlers/xml-rpc_handler.php [L]
RewriteRule mt/mt-xmlrpc.cgi engine/handlers/xml-rpc_handler.php [L]
RewriteRule ^rewrite.php$ install.php [L]
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^([A-Za-z0-9\_\-]+)$ engine/handlers/page_handler.php?handler=$1 [QSA,L]
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^([A-Za-z0-9\_\-]+)\/(.*)$ engine/handlers/page_handler.php?handler=$1&page=$2 [QSA,L]

Sorry that was wrong forgot to edit it.

RewriteRule ^pg\/([A-Za-z0-9\_\-]+)$ engine/handlers/page_handler.php?handler=$1&%{QUERY_STRING} [L]
RewriteRule ^pg\/([A-Za-z0-9_\-]+)\/(.*)$ engine/handlers/page_handler.php?handler=$1&page=$2&%{QUERY_STRING} [L]
RewriteRule ^tag\/(.+)\/?$ engine/handlers/page_handler.php?handler=search&page=$1 [L]
RewriteRule ^action\/([A-Za-z0-9_\-\/]+)$ engine/handlers/action_handler.php?action=$1&%{QUERY_STRING} [L]
RewriteRule ^cache\/(.*)$ engine/handlers/cache_handler.php?request=$1&%{QUERY_STRING} [L]
RewriteRule ^services\/api\/([A-Za-z0-9_\-]+)\/(.*)$ engine/handlers/service_handler.php?handler=$1&request=$2&%{QUERY_STRING} [L]
RewriteRule ^export\/([A-Za-z]+)\/([0-9]+)\/?$ engine/handlers/export_handler.php?view=$1&guid=$2 [L]
RewriteRule ^export\/([A-Za-z]+)\/([0-9]+)\/([A-Za-z]+)\/([A-Za-z0-9_]+)\/$ engine/handlers/export_handler.php?view=$1&guid=$2&type=$3&idname=$4 [L]
RewriteRule xml-rpc.php engine/handlers/xml-rpc_handler.php [L]
RewriteRule mt/mt-xmlrpc.cgi engine/handlers/xml-rpc_handler.php [L]
RewriteRule ^rewrite.php$ install.php [L]
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^([A-Za-z0-9_\-]+)$ engine/handlers/page_handler.php?handler=$1 [QSA,L]
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^([A-Za-z0-9_\-]+)\/(.*)$ engine/handlers/page_handler.php?handler=$1&page=$2 [QSA,L]