Stream Profile

We are starting to use Stream profiles what we need now is how do I switch from one stream profile to another in a iRule. Below is the iRule I am testing out. It throws out the following error

 

line 3: [undefined procedure: stream] [stream test ]

 

 

when HTTP_REQUEST {

 

if { [matchclass [IP::remote_addr] equals $::RIchards_IP] } {

 

stream test }

 

}