DW Template and SS

Hi
I am trying to use SS with my own temaplte for the first time.

I create the temaplate.

I Create a new SS Preset using the Preset Manager importing the DW temaplte previews look fine selecting the relevant regions all good.

So click to create and bang.

Lots of Not Found Errors in all the pages.

When you open them in DW the same errors pop up.

The error contains what looks like loads of DIV markup from the pages so much so they more than fill the screen so I cannot even see the full error or any buttons to close the popup boxes.

Any ideas?

Thanks

BTW I am using a 3rd party tool for the CSS Layout. I obviously do not want to mention that on here. It does create 100% Validated CSS.

Thanks

Mike