Moh + queue

when people dial into any queue (from any trunk ie pstn, isdn, voip) the first peron is met with the correct greeting and then MOH.
the second and subsequent persons get met by silence until the first "you are currently X in line blah blah"
then, the MOH starts palying and works as it should.
anybody else had this?
Is it a queue bug???
I use asterisk 1.2


i’ve update asterisk to the version 1.4.16
I think this problem is a bug of version 1.2.24