No effect on shooting fuel tanks and ammo supply

[JPiper]

In the EU official 1CGS server Planes and Tanks Normal by DED there is a battle called TANKS RUSH from the starting point in a tank at the top of the hill there are enemy fuel trunks and ammo to be exploded. However no matter what is shot at them nothing happens, it used to but as of late nothing. What happened ? Can it please be fixed.