Help with IRule

Can you please help with the following iRule which is not working at all.

For client IPs that do NOT match SS_CMS_Nets and hit the URI specified in SS_CMS_URLs redirect back to /

when HTTP_REQUEST {

if { not ([matchclass [IP::client_addr] equals $::SS_CMS_Nets]) and ([string tolower [HTTP::uri]] contains $::SS_CMS_URLs) } {

HTTP::redirect "/"

}

}

SS_CMS_Nets

192.168.1.0/255.255.255.0

SS_CMS_URLs

"/server2"

Many thanks,

esexon