Follow the steps below:
1) Edit <AppManager Home\conf\AvailabiltyTests> file
2) Change the entry <am.porttestenabled=false> to <am.porttestenabled=true>
3) Then change : if telnet <am.portstotest=23>, if SSH <am.portstotest=22>, if WMI <am.portstotest=445,135>
4) Restart Applications Manager and then monitor the system