Following iRule not working in my setup please correct mistake if found

when HTTP_REQUEST { if { [string tolower [HTTP::host]] equals "mfcomb.birlasunlife.com" } { if { ([string tolower [HTTP::uri]] starts_with "/media") or ([string tolower [HTTP::uri]] starts_with "/mediaupload") or ([string tolower [HTTP::uri]] starts_with "/webchat") or ([string tolower [HTTP::uri]] starts_with "/webtrak") } then { pool Talisma_MF_Webchat }else{ pool UAT-VS_pool } }