Issue with http redirection in version 11.5.1(previously working with http class profiles in version 11.3)

Do you see any errors in /var/log/ltm?

tail -f /var/log/ltm

Please be aware, that changes to your iRule will apply to new connections only.

A browser will try to maintain keep-alive connections and changes will not be working on existing connections.

So closing all browser windows will be mandatory.

Or just test via "cURL" (please replace value of host header and path accordingly):

curl -I -H "Host: abc.com" http:///xyz/tmz/qpd.apex