HELP FOR ZAGREB INSTALLATION

Good morning to all,
I am the programmer of the project www.geniusterrae.org.
We put Arduino tecnology in the art installatio placed in HDLU garden in Zagreb.
Arduino+sd shield+gsm shield collect data of pollution and environment and send these on our web site.
During our stay in Zagreb, we never had transmission problems, but once back to Italy, Arduino stopped transmitting.
We're looking for someone, with experience, to reset the system on site, or update the firmware .
On the site are still a few technical information because we are behind schedule.
If anyone could help us please contact me (technology@geniusterrae.org)
I will provide schematics and firmware, unfortunately not yet on the site.
We are in a hurry, because the project is already start.
Thanks to all those who want to help us and be part of the project.
Peter