no album thumbnail / preview

Hello

the preview thumb will not generate…
the link to the thumb is wrong.

<img class=”Thumb” alt=”Pics” src=”www.site.de/wordpress/nextgen-image/195/91×68/crop/3be414635af116cdcd715fa42f3552dc”/>

what can i do?

SERVER:
Betriebssystem : WINNT (32 Bit)
Server : Microsoft-IIS/7.5
Speicherverbrauch : 63.28 MByte
MySQL Version : 5.6.14
SQL Modus : NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
PHP Version : 5.3.27
PHP Safe Mode : Aus
PHP Allow URL fopen : An
PHP Memory Limit : 512
PHP Max Upload Gr??e : 800M
PHP Max Post Gr??e : 800M
PCRE Backtracking Limit : 1000000
PHP Max Script Execute Time : 300s
PHP Exif Modul : Ja ( V1.4 )
PHP IPTC Modul : Ja
PHP XML Modul : Ja

Grafik-Bibliothek
GD Version : bundled (2.1.0 compatible)
FreeType Support : Ja
FreeType Linkage : with freetype
T1Lib Support : Nein
GIF Read Support : Ja
GIF Create Support : Ja
JPEG Support : Ja
PNG Support : Ja
WBMP Support : Ja
XPM Support : Ja
XBM Support : Ja
JIS-mapped Japanese Font Support : Nein

thanks for help, greetings
leonid

https://www.ads-software.com/plugins/nextgen-gallery/