I would not monitore performance but start troubleshooting probes.
gdufour-cat6k-2#sho mod csm 3 tech probe
Software version: 4.2(3a)
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------------------ Health Monitor Statistics -----------------
--------------------------------------------------------------
Probe templates: 0
Suspects created: 0
Open Sockets in System : 8 / 240
Active Suspect(no ICMP): 0 / 200
Active Script Suspect : 0 / 50
Num events : 0
Probe attempts: 0 +0
Total recoveries: 0 +0
Total failures: 0 +0
Total Pending: 0 +0
Make sure you do not exceed the number of sockets, active suspect, and active script.
Get a sniffer trace between the module and the server to see if you do get a response from the server.
G.
