[Plugin: NextGEN Gallery] Thumbnail do not show

Since i upgraded wordpress and gallery, both the same day, as i upload new images in gallery, thumbs r created, but do not show. Tried with permissions, still nothing. I know i wrotte before in a similar topic, but i need to fix this as soon as posible. I tried to rewritte older version over the new, and then it works, but slideshow widget doesn’t work, it just aks users to download newes flash player, but when they do, still nothing…

Operating System : Linux
Server : Apache/2.0.61 (Unix) PHP/4.4.7 mod_ssl/2.0.61 OpenSSL/0.9.7e mod_fastcgi/2.4.2 DAV/2 SVN/1.4.2
Memory usage : 14.84 MByte
MYSQL Version : 5.0.67-log
SQL Mode : Not set
PHP Version : 5.2.6
PHP Safe Mode : Off
PHP Allow URL fopen : On
PHP Memory Limit : 90M
PHP Max Upload Size : 7M
PHP Max Post Size : 8M
PHP Max Script Execute Time : 30s
PHP Exif support : Yes ( V1.4 )
PHP IPTC support : Yes
PHP XML support : Yes