Cool. Thank you
Unfortunately, your GPU card not appropriate for these apps. ATI HD4xxx and higher required.
But you still can use so called "hybrid" AP application that uses pre-4xxx ATI cards for some parts of calculations. Look release section for this app (it has "released" status already).
Also, you can download it via SETI beta project and test it (and any new versions that project will have for such cards) there.