iRule Script in Ver 9 is not functioning

So given this rule:

when HTTP_REQUEST {
  set uri [string tolower [HTTP::uri]]
  if { ($uri starts_with "/webnav") or ($uri starts_with "/webapp") } {
    log local0. "URI matches, redirecting to HTTPS"
    HTTP::redirect "https://[HTTP::host][HTTP::uri]"
  } else {
    log local0. "No match, forwarding to the pool"
    pool POOL_HTTP_Vlan70
  }
}

The request should be redirected to the same host and uri, but using https, if the uri starts with either webnav, or webapp. Otherwise it will be passed to the http pool listed.

When testing this, if it "freezes", please be sure to check the logs to see what occured in the rule.

-Colin