Router appears in tracert but can't ping?

["Stefan Neufeind" <stefan@neufeind.net>]

Hi,

both tracert and ping use ICMP. So did they just block some kind of 
ICMP-message (ping) for this router? How could I solve this problem? 
I need to check if the route to this router is alive - namely if the 
router is up. Can I trick this into working by choosing a TOS for 
ping manually?

  Stefan