audio lost 5 seconds

[crosemffet]

I\'m having some audio quality problems.
sometimes everything goes fine, and sometimes I lost 5 to 10 seconds of audio, and then the conversation continues.
I\'ve been reading in previous posts, and babar tell that maybe is a jitterbuffer configuration problem.
so, the question is:
should I configure something in my vb code or javascript webphone code to use jitterbuffer enabled (ie like iaxclient.jitterbuffer true)
my iax.conf in asterisk is:
jitterbuffer=yes
forcejitterbuffer=yes
;dropcount=2 (commented).
maxjitterbuffer=1000
maxjitterinterps=10
resynctreshold=1000
 
thanks in advance,