sometimes is worthwhile to take a closer look at the network card. Reading related postings in related news groups I found that there are different Netelligent cards, which use different chip sets. The newer cards, like the one we have here uses an Intel chip and not this tlan set. Therefore the tlan module did not work. Choosing the eepro (Intel EtherExpress) driver from the installation menu solved the problem. Everything works fine now.
Thank to all who relpied to my questions.
Have fun,
Markus
-- -------------------------------------------------------- Dr. Markus WOLLGARTEN http://www.iap.ethz.ch/users/wollgarten/index.html --------------------------------------------------------