Games : I can't get my truffle to move in terraria iOS it just won't?

My truffle won't move in i have beaten ocram even and it still hasn't moved in I made and overground mushroom biome but nothing is happening it just keeps sayin maitake would like to settle in . SOS PLS HELP! I don't have pics but I can describe it to you it is a skybridge 3 blocks thick around 150 blocks really really long has 2 house still vacant and the truffle won't still move in! Pls help onece again I have been trying for 2 days