htaccess force Lowercase url

[acctman]

i'm trying to for all urls to be lowercase on a Godaddy server for someone. i've tried the code below but keep getting an internal/500 error. RewriteMap i'm assuming needs to be set in the httpd.conf in which I don't have access too.

#RewriteEngine On
#RewriteMap lowercase int:tolower
#RewriteCond $1 [A-Z]
#RewriteRule ^/(.*)$ /${lowercase:$1} [R=303,L]

RewriteEngine On
RewriteMap  lc int:tolower
RewriteCond %{REQUEST_URI} [A-Z]
RewriteRule (.*) ${lc:$1} [R=301,L]

[acctman]

update... this ended up working for me.

Options +FollowSymlinks
RewriteEngine On
CheckSpelling On
CheckCaseOnly On