Lavelle, the image doesn't say too much about the size of your model so if the problem is what I suggested above, it won't be any help.

Say if the diameter of the whole shape is within a couple of centimetres (about an inch), the issue can be what I suspect. In this case, use the workaround above. If the shape is about a couple of metres (yards), there is something else.

So to say; we aren't any closer to the problem and solution than before.