If the front hubs look like the ones in the pics on the thread above (Steve's post) then they are auto hubs (and damn those white wheels were clean!) --- I have copied the picture of the Auto Hubs across for comparison together...
AUTO HUBS
MANUAL HUBS
Then you have manual hubs and you will have to turn that to LOCK in order to make the hubs engage.
Let us know what ones you've got.
It might be worthwhile having a read through
THIS THREAD before trying again and also before pulling the hubs apart. It might be technique more than a problem (not saying you don't know what your doing, but have a read and then go play, don't forget to not do it on tarmac!)
Good luck and let us know how you get on.
PS. the 2.0 is not very good on fuel economy! (Drive it steady and don't rev it too hard and it does get slightly better but it's a heavy vehicle with a small underpowered engine)
Si