Problem with planetphone.net trunk

Hi,
Planetphone.net trunk can't register most of the time.
Planetphone's support is asking me for IP to see what is wrong, is this ok?

I can register from a device at home, or soft phone, but not from pbxes.org
I checked userid, password, sip, etc. - they are the same.

The rates for mobile calls are very good, so I really like to have this trunk working


Update:
Part solution is to use other servers:
188.40.65.170 www1
76.191.104.53 www2
67.231.245.210 www4
124.35.3.68 www6
173.44.36.218 www7,

but I'm in Europe 88.198.69.250 www3

Why only 88.198.69.250 is not working with planetphone.net???
I don't want to use (if possible) other servers due to clock and schedule problems.

Planetphone admins told me that there is no block on their side and that they don't see request from 88.198.69.250

This post has been edited 1 time(s), it was last edited by dka on 28.12.2012 at 15:40.