Have you get the report of PTP?
Most probabily this issue is running because of the defintion problem.
In SEP 11.x it's only be supported 32 version only for client system. No support for 64 bit clients and server clients.
You can repiar it with the help of download doc for 11.x client
https://www-secure.symantec.com/connect/downloads/ptp-services-not-working-sep
SEP 12.x it is properly support and this can be fix with repair the component.