There are tons of team recruitment post by people relatively new to the forum, there are a ton of projects that are being started and never being finished. If I made a team recruitment post that consisted of 2 lines, I would probably get a few applications because people know me and know that I will probably finish a project and can also contribute well to it - You, on the other hand, are new to the forum. I don't mean to be offensive or rude, but look at other people's perspective: Some new guy shows up, says he needs someone to make abilities, and that's it. If you want to get people's attention, write about your project, show off things you yourself have done, write down what parts of the map you are doing, mention what experience you have with mapping (both in sc2 and previous games). Videos and screenshots help as well. And don't worry about someone stealing your idea - We've all got our own things to work on, we've got our own ideas, no one needs to steal an idea. And in case someone does, the maps will still be very different because its not the same people working on/designing it.
So... In general, if you want a team, tell people what it is you're working on and give them a reason to join.