Nothing is wrong with your gig in most cases but the issue is that presently on Fiverr, It takes months for people to get their first order now most especially when there are no buyer request to convert buyers to your inbox and there are more sellers joining Fiverr everyday.
And if your gig is not yet in the first page too, it will be difficult to get message not to talk of orders because definitely buyers won't want to scroll a mile before choosing a seller for their projects.
Solution
All you have to do is to kindly promote your gig to have in on first page or near.
Probably brief too maybe of help, but even till now, even I haven't gotten a brief yet, but with time, things will work out.