To all people who have contributed to the problem I had to solve, it is fixed!! I will explain how. With all things we have tried it was clear that everything did work fine in xp. So it would be a problem in windows7. Today me and a colleague looked at all the settings in the firewall windows7. I didn'n now that windows 7 has 3 options in the advanced settings, a domain profile, a public profile and a private profile. All settings must be set to off (disabled). After i did this remote via rdp, one of the first things I did after I came home was to try it out. After a litle change in the haneWin export-file (ad -public) I started up the wdtv, amazing, it works!!
Hanewin exports:
j:\Muziek -name:Muziek -public
j:\Fotoos -name:Fotoos -public
j:\Films -name:Films -public
Thank you all for your time, a special thanks to KAD, Ripper2860, Refdrew and B-rad.cc, you have spend a lot off time to help me out.
I hope that every windows7 owner in combination with the hanewin nfs-server and wdlxtv can learn something about it.