Guild Wars 2

I ’ve complited W1Z3 in tribulation mode,killed king toad and got King toad Z-3 item,but…I didnt get the achievement for compliting this.So Im very disappointed about that.I know that 1 of my guildmates had the same problem.And i want to ask if its happend with someone else.And if i do it again,any chances that i will get this achievement?

Have you perhaps died after killing the boss (killed by a trap?) and then weren’t near the chest when the timer went out? Apparently you need to be close to the chest when the timer runs out in order to get the achievement. I knew this when doing my run of world 1 in tribulation mode so I pretty much stood perfectly still after looting the chest, and got the achievement..

Just complited it again and got the achivement.But anyway its not good.And yes i died after killing the toad when i complited it the 1st time.