ISDN Dial IN

Hello,

I`m having some problems reaching some sites on mij network like

myaccount.voipbuster.com (ping works no page comming for 2 days now)
http://www.mikrotik.com/docs/ros/2.8/ (not working / mikrotik.com works fine)

Now i want to setup an isdn dial up link to my provider but its not working

Im using ISDN-Client interface with HDLC L2 protocol but the link is complaining about (could not determine remote ip adress)

What am i missing ?

We can’t help you not knowing your configuration.