HELP>>I can't seat my tubeless tire...

I'm trying to get a michelin 2.5 tubeless tire to seat on a deemax rim. I've tried several times with an air compressor, but it won't even start. most of the tire bead rests in the center channel of the rim and the air just blows right out around it. How do I get the bead over to the edges where it's suppose to be? I'v taken the tire off and on again with soapy water to try and get it to seat, but same thing happens.
any suggestions??