[Click] two configuration tests

[Yihong Zhou]

I run two configuration files in the userlevel: 

test-device.click  : FromDevice(eth0)->print(ok)->discard

and  print-ping.click : FromDevice(eth0)->Classifier(12/0800)->Strip(14)->CheckIPHeader->IPFilter(allow icmp && icmp type echo) -> IPPrint -> Discard.

I sent one ping packet to the machin.  The second one works perfect.  That is, it printed exactly one ping packet.  But the first one printed infinitely with almost the same information: ok:    66 | 000d56be  78cb00b0  d0793d61 .....

Can anybody tell me the reason?