ICMP pinger problem

Hi,

in my cache.log I found the following:

2014/03/28 20:07:27 kid1| Accepting HTTP Socket connections at
local=0.0.0.0:3128 remote=[::] FD 30 flags=9
2014/03/28 20:07:27| pinger: Initialising ICMP pinger ...
2014/03/28 20:07:27| icmp_sock: (1) Operation not permitted
2014/03/28 20:07:27| pinger: Unable to start ICMP pinger.
2014/03/28 20:07:27| icmp_sock: (97) Address family not supported by
protocol
2014/03/28 20:07:27| pinger: Unable to start ICMPv6 pinger.
2014/03/28 20:07:27| FATAL: pinger: Unable to open any ICMP sockets.

Any ideas how to fix ?
Is this important ?

Thanks
 Chris

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Christian
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