OK...it's me again...a problem about awstats

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all features are well running except awstats.

when i access http://xxxxxx/stats/ (xxxxxx means a virtual host) it ends up with error 500.

in the error log it says:

Quote:[warn]proxy: No protocol handler was valid for the URL /stats/. If you are using a DSO version of mod_proxy, make sure the proxy submodules are included in the configuration using LoadModule.

and "Additionally, a 403 Forbidden error was encountered while trying to use an ErrorDocument to handle the request."

ok....any ideas?????