Solved. "secret" was
#rm /etc/resolv.conf
#ln -s /etc/ppp/resolv.conf /etc/resolv.conf
with vwdial or sakis3g it works.
Thanks to "gapan" post!

Hi, I have installed Salix 13.37 in vmware player and my problem is that the only way to connect to internet is via mobile broadband.To connect I have installed offline usb_modeswitch, wvstreams and wvdial by installpkg, I am a beginner and I do not know if this is the right way to do in salix ...