[HELP] Cannot make giveaway

I think its a game that cannot be giveawayed like Gun Monkeys or Warlock. Nope,i found another reason under.

I have that problem but it also says that the giveaway must be created after the current time, i always set the time as "now" but i think that the time of steam and my time may be unsynchronized (even when i never had problems before) i just make the giveaway starts before the current time (i think that for me 3 hours later is now for the site)

If you look carefully, you probably took too much time to type the description and the giveaway is starting "minutes ago". Try setting up the whole giveaway, then clicking start "now", and immediately clicking create giveaway.
Alternatively, you can just set the giveaway to start in five or ten minutes.

It worked!
Hmm, yeah. So that's the problem. I cannot make the giveaway when the start time has passed. Never realize that before until now. Thanks a lot!