this is a design problem... refer this for some details on this...

http://connect.microsoft.com/SQLServer/feedback/details/522602/tracer-tokens-should-post-to-all-subscriptions

I have a replication for which the commands are moving fine from distributor to subscriber but when i insert a tracer token, one out of the 5 subscribers isn't getting...

yup!! tried stopping the distribution agent job and restarting it again.... also dropped and recreated the subscription... still the problem persists...