Digi ESP Problem Kubuntu 10.10 and no update possible


I’ve reached my Digi Wi-9C with the development kit.
I’ve tried to install Digi ESP on Ubuntu 10.10, but the eclipse windows appears grey all the time.
After installing the live DVD, eclipse is still operable, but my Ethernet card on my Dell Optiplex 780, was not found by the Kubuntu delivered with the live DVD.
After installing Kubuntu 10.10, the same problem like Ubuntu 10.10 appears.
An update of ESP 4.0 fails with the error, that I’ve no access to the jumpstart.digi.com/assets/esp/linux4.0/ (Error 403 – Forbidden).
I’ve searched for Digi ESP 5.0 but I couldn’t find a Download.