Zabbix 2 Background image in maps

[alex92]

I have some trouble with zabbix 2 to get background images in maps.
Zabbix just shows me a white screen instead of my background picture.

I search this forum and find that it may be because of an non utf8 database.
I check my mysql database and everything seems ok :

mysql> SHOW VARIABLES LIKE 'char%';
+--------------------------+----------------------------+
| Variable_name            | Value                      |
+--------------------------+----------------------------+
| character_set_client     | utf8                       |
| character_set_connection | utf8                       |
| character_set_database   | utf8                       |
| character_set_filesystem | binary                     |
| character_set_results    | utf8                       |
| character_set_server     | utf8                       |
| character_set_system     | utf8                       |
| character_sets_dir       | /usr/share/mysql/charsets/ |
+--------------------------+----------------------------+
8 rows in set (0.00 sec)

mysql> SHOW VARIABLES LIKE '%collation%';
+----------------------+-----------------+
| Variable_name        | Value           |
+----------------------+-----------------+
| collation_connection | utf8_general_ci |
| collation_database   | utf8_general_ci |
| collation_server     | utf8_general_ci |
+----------------------+-----------------+
3 rows in set (0.00 sec)

If i go in Administration -> General -> Images, i can successfully upload my images (jpeg and png works) and i can see the miniature.
Then if i create a new map, i can choose my background picture in the menu.
But i can't see the background, either in editing map or in view map.

Can you please help me to find what's wrong ?
Thanks

[alex92]

I made another test with another image and it works !
And i finally managed to use my first image after resize it to 800 x 600