monitor to turn off pool member if http response is 501 or 502 0r 503

Hi nitass,

Could you please confirm if these are correct. I tried them but pool member is marked down, actually the member is up.

send string : GET /monitoring/health.svc HTTP/1.1\r\nHost: \r\nConnection: Close\r\n\r\n

receive string: ^HTTP\/1.[10]\s50[1-3] with reverse setting.

so if response code has 501 and 502 and 503, the pool member shld be offline. Please let me know if I have made any mistake in the syntax as the above is not working.