The fences need at least one expansion pack to show up in game, the gate needs the OfB expansion.
Consider to skip the "Mucho Macho Gate", as it's only half of a gate. It has its functions (e.g. lockable), but it has no doors. I removed them because their iron work texture looked too blurry and flat for my taste. I use it as an arch and with other fences than the associated "Mucho Suave Fence". Though there's no reasonable obstacle not to attach it to that fence. Tastes are different. ;)
Credits and thanks: EA for the meshes, SimPE, CEP, MilkShape, TSRW, Gimp
Download here: http://www.mediafire.com/download/lgeiu2i1n0n21q2/mif-VariousFences.zip