Need more time for folder scan

Hello all,

I’m i bit confused! I want to publish my latest holiday pictures, so I added a new gallery, load up the pictures (with a ftp client) and now i tried to initgrated the pictures in the gallery using the “Scan Folder for new images” Button and after some second I get this error message:
“Fatal error: Maximum execution time of 30 seconds exceeded in /..xx../wp-content/plugins/nggallery/lib/thumbnail.inc.php on line 175
“

How can I enlarge this period of 30 seconds, I need some more time (it was big holiday trip 😉 )

THX

Fabian