Yournavigation.org API Problem

Hi All!
I would like to use Yournavigation.org API.
I did my work step by step using documentation:
http://wiki.openstreetmap.org/wiki/YOURS

Unfortunatery something is brooken:(

I want to use it within my app so I have to use proxy
That addres works fine
http://www.yournavigation.org/api/1.0/gosmore.php?format=kml&flat=52.215676&flon=5.963946&tlat=52.2573&tlon=6.1799&v=motorcar&fast=1&layer=mapnik

but when I run it via my proxy I recive default answer
http://www.glapa.eu/proxy.php?url=http://www.yournavigation.org/api/1.0/gosmore.php&format=geojson&flat=52.215676&flon=5.863946&tlat=52.2573&tlon=6.1799&v=motorcar&fast=1

using recommended proxy I receive internal error 500:
http://www.glapa.eu/transport.php?url=http://www.yournavigation.org/api/1.0/gosmore.php&format=geojson&flat=52.215676&flon=5.863946&tlat=52.2573&tlon=6.1799&v=motorcar&fast=1

What is strange, using the same proxy on other domai, but the same server works differently:
http://www.geostrona.pl/transport.php?url=http://www.yournavigation.org/api/1.0/gosmore.php&format=geojson&flat=52.215676&flon=5.863946&tlat=52.2573&tlon=6.1799&v=motorcar&fast=1

Help! How to force it to work for me?