Changing destination pool TCP port via iRules

Using this rule set:

when CLIENT_ACCEPTED {
  set dport [TCP::local_port]
  if { [lsearch $dport [list 12005]] != -1 } {
    TCP::collect 1
    return
  }
}
when CLIENT_DATA {
  if { [TCP::payload] contains "myData" } {
     set new_port 12007
  } 
 TCP::release
}
when LB_SELECTED {
  pool member [LB::server addr] $new_port
}

I get the error: line 18: [can't find pool] [pool member [LB::server addr] $new_port]

I don't think there is a way to call the command "pool" without a pool name as the 2nd argument.

BTW: Tested on version BIG-IP 9.1.2 Build 40.6

-Corey Smith