Those channels are using the Europe beam:
_http://en.kingofsat.net/beams.php?s=111&b=193
Can you open these links barbod_f, you were having problems with blocked sites?
I realise that these channels are listed in your satellite receiver but are you sure that your dish is pointed at 13E and you're receiving a strong signal for HBO?
Many channels share the same frequencies, on different satellites, so even though you think you have your dish aligned to 13E and are getting a good signal for some channels you might not be.
Try tuning in to a Free to Air channel, on 13E, that is broadcasting on the same beam, Europe, like Arryadia, and other Arab channels on 10873 V 27500.
_http://www.lyngsat.com/hotbird.html
These are listed as broadcasting on the same beam, Europe, as the Cyfra+ package, so check your signal strength, for all times of the day, in different weather conditions, and see if you can get a stable picture.
The dish sizes, indicated in the maps:
_http://en.kingofsat.net/beams.php?s=93&b=131
are only approximate so it requires information from someone in your area to confim what channels are available on your size of dish, or for you to test them yourself.
Either the site is experiencing problems or the proxy has been blocked, and from the message it looks like it's been stopped, try another one.