BIKI Exchange withdraw problem

Hi all. I did the competition of deposit ETN omn biki but now i am having troubles to withdraw my founds.
The coins are Available , i press withdraw and i write my correct public address. i don’t know what i should write on the “TAG memo” as etn doesn’t require it ( Am i right ? ) Also i don’t know what to write on the section “REMARK of address”
Biki support suggest to write 000000 on both section but even with that the withdraw keeps on Failing .

Can anyone give me some suggestion ? thanks in advance !!