Convergance study

Hi guys I am having a problem trying to get my simulation results to work.  The table below shows the results I am getting. The displacement goes from 57 to 0.8 just by changing the global mesh size by 1?!

Global mesh size in SOLIDWORKS2122
Elements55122153
Displacement8.83E-015.72E+01

Yet in previous tests;

2224.527
323725002153
5.72E+014.50E+021.93E+02

There is a bit of a pattern, however oddly enough when the mesh becomes fine, the results go up and not down

Mesh Density14.51719.5
Elements978278976135
Displacement1.37E+001.24E+001.09E+00

Does anyone know what is going on?

SW 2013 Simulation Pro. Win 7 - 64bit

For the record I have done a similar simulation in Abaqus with a different model - my results were as follows.

Mesh Density0.00010.00050.0010.0050.01
Elements346185448708252221
Displacement1.99E-041.98E-041.97E-041.87E-041.73E-04
SolidworksSimulation