Rewrite URL getting internal error 500

[jansky]

hi guyz

why is it im getting internal errror 500 when im using
RewriteRule ^user/(.+?)$ /profilepage.php?%{QUERY_STRING} [L]

but when i use
RewriteRule ^(.*)$ /404.php

its working

[bradgrafelman]

If you're trying to add the query string to the rewritten URL, then add the 'QSA' flag/modifier at the end. I don't think you can use %{} variables in the replacement URL.