Build Problems

I have followed the instructions for installation and added the three swc files under TextLayoutFramework/libs into Flex SDK frameworks/libs folder (which in my case sits under my flexbuilder directory). When trying the example app (simple editor), I get the following errors in Eclipse:
Errors (16 Items)
1046: Type was not found or was not a compile-time constant: ContentElement. SimpleEditor Unknown Flex Problem
the other items which can not be found are: ElementFormat, FontMetrics, GroupElement, TextElement, TextLine and Vector.
I have checked that my eclipse project properties reference the correct sdk which includes the three required swcs.
I am using Flex SDK 3.2.0 build 3958

any help appreciated, thanks, dan