parameters in get string for monitor

Hi,

 

 

i am trying to use a parameter in the get string for a custom health monitor and it seems to fail, do I need to do anything specific for parameters in the monitor

 

 

I have send string: GET /checkpage?id=app HTTP/1.1\r\n\r\n

 

 

Recieve string: WorksGreat

 

 

 

if i go to the server (pool member on /checkpage?id=app then I get the correct response)

 

 

Thanks