OK
1) vicibox redux v3.0.9 |vicibox server 3.0 | asterisk1.4.38 |single server |no digium\sangoma hardware
2) vmware is not clustered. just a simple vmplayer.
3) so ztdummy is not load, i guess is by the fact that dahdi is on it.
4) th ip hasnt been changed since instalatioin.
5) i checked the ip server of teh meetme rooms. and also checked the meetme*.conf files and the rooms are there ,.
6) when i dial directly the conference from a phone happens the same.
let me know if i left something.