Bombarding planets does not work ?

I tried to send starships to bombard enemy planets today, but it's not responding. The screen reverts to default planet page. I am connected via WH and have enough ships, jumpgates, enemy has structures but when I click on "bombard" link nothing happens. Ships are not sent, I don't recieve any error notice. I am using ZK lobby. What is wrong?

HEy, 4 your own good, u just lost 40% influence on Pikkiki.... But hey, i never told you that....

Aww some people just can't take a joke! :p