Ok i have some pictures where i can show you my problem
With rods:
the signals is intermittent i'm getting like 2 msg/s and then 0 and so on
Without rods:
Polar diagram
It seems to be a better coverage without VHF antenna rods so i dont know if the VHF antenna is interfering with the ADS-B antenna
Antenna surroundings:
http://imgur.com/a/IJF7KGreetings.