General Support: Mass image import doesn't work

Hi,

I just installed Plogger on my server with nginx, MySQL5 and PHP5. I uploaded a folder with 2548 images to the plogger upload dir for importing them into plogger. At first i got this error message from nginx:

"[error] 9791#0: *1 client intended to send too large body: 1514285 bytes"

I set the client_max_body_size variable of nginx to a higher value and the message disapeared. Now when I click the import button in plogger it takes a couple of seconds and again it apears the page where I can select the folder I want to upload. And plogger imported NO SINGLE IMAGE.
Well I think its because I'm running into some limit of PHP, MySQL or nginx, but I have no idea what exactly causes that error. The logs aren't helpful either. I hope you can help me and give me a hint.