rewrite rule not working

hi. ok so i've got two rules in a .htaccess file. both of them are valid. only one works. here are the pertinent lines in my .htaccess: RewriteEngine on RewriteBase /~cparker/ RewriteRule ^products/([a-zA-Z0-9-]+)$ product.php?id=$1 RewriteRule ^verify/([a-f0-9]+)$ verify.php?uid=$1 Here is how the rules would be used: (this one works fine) http://domain.com/~cparker/products/ABC001 (this one gives a 404) http://domain.com/~cparker/verify/a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4 I can't figure out for the life of me what's wrong with the second rule. Anyone see a mistake? Chris.