Might be a daft thing to say but did you firm the soil afterwards and add any feed? It could just be as others have said and that they need time to settle in but just check one out to see if there are any roots showing.
I didn't need to firm the soil as it was fairly moist/packed anway, i just pushed them into the ground and covered the tops over if any long bits poked out. Initially I placed half a pop bottle over each one to protect them and this helped keep the soil drier around each bulb, however some strong wind saw them off!
They look to be rooted and the tops have shot up since planting in Sept.
In terms of the raised 1ft thing, they actually aren't; when I inherited the plot the soil levels were about 8-12" below ground level so having topped that bed up a ft it's still only at groumd level generally, if that makes sense.
I was wondering if sinking a garden fork fully into the ground at regular intervals might help with drainage around the bulbs, or if this would just make the problem worse?