PhalGen thumbnails creator

source image: img_1986-05-12_Sumperk_ZOS_M296-2008A_Ladislav_Kroul.jpg
thumbnail file: THN_IMG_1986-05-12_SUMPERK_ZOS_M296-2008A_LADISLAV_KROUL

ERROR: Could not create the thumbnail!
Possible reason: JPEG images not supported by server