Rockets being destroyed before doing damage

I have used Rockets but they are being destroyed without doing any damage. I am NOT using flying bombs (V1). My rockets were flying in to attack. They were NOT on the ground.

7:32 am Vienna: The 26th Rocket Battery (SOUTH SUDAN) (DX 26) has been destroyed by the 21st Railroad Gun Regiment (POLAND) "".

7:34 am Lwów: The 12th Rocket Battery (SOUTH SUDAN) (DX 12) has been destroyed by the 21st Railroad Gun Regiment (POLAND) "".

7:35 am Prague: The 44th Rocket Battery (SOUTH SUDAN) (DX 44) has been destroyed by the 21st Railroad Gun Regiment (POLAND) "".