welcome to the forum
It sounds like you are doing everything right to me...it could possibly be that the CF card you have chosen will not work. In the beginning...it was discovered that Lexar CF cards didn't seem to work for CF installs. Perhaps this is the same deal with your TwinMOS CF? Can you try a different CF card for the install and see if it makes a difference?
As an aside, I haven't heard of TwinMOS CF cards. At 140X, that makes it the fastest CF card I know of. The fastest card I'd heard of before this was the Sandisk Extreme III (that is what I have). Looks like the TwinMOS 140x card you are referring to can be had for ~$60 which is a killer price!