snmptd probe is not able to receive traps from the respective drive. However traps are hitting the server when checked from wireshark.
From the netstat output can see UDP port 162 active even when the snmptd probe is deactivated .This implies some other application is listening to that port .
Ensure that ports used are free (UDP/162 is the default port). You can issue the netstat -an command to search and confirm the port status. For example, if the UDP 0.0.0.0:162 port is present, then some other application, such as HP OpenView and Compaq Insight Manager are using this port.