I upload photos and after that I get this message

Warning: copy(/home/np231/domains/omnirem.ee/public_html/pulm/zp-core/images/multimediaDefault.png) [function.copy]: failed to open stream: No such file or directory in /home/np231/domains/omnirem.ee/public_html/pulm/zp-core/controller.php on line 16

There should be such an image included as part of the zenphoto release. However, for version 1.2.1 we are changing it so that the image does not need to be copied. I suggest you install the current nightly build.