Need some help obtaining the following rule working:

RewriteCond %{HTTP_HOST}            ^asset.*.domainone\.com [NC,AND]
RewriteCond %{REQUEST_URI}          !^/FILE/.* [NC]
RewriteRule ^(.*)$              "http://domaintwo\.com/$1" [L]

For demands visiting this server having a domain of 'asset(anything).domain.com' which doesn't begin with 'FILE', redirect to a different server.

Thanks.

RewriteCond %{HTTP_HOST} ^asset.*?\.domainone\.com [NC]
RewriteCond %{REQUEST_URI} !^/FILE/.* [NC]
RewriteRule ^/(.*)$ http://domaintwo.com/$1 [R,L]