'', 'Large Image Width (Pop-up)', 'LARGE_IMAGE_WIDTH', , 'The pixel width of large images (Pop-up)<br>(Use 0 for non-specific size)', 4, 32, now( ) , now( ) , NULL , NULL
you have two commas in a row
replace with this:
'', 'Large Image Width (Pop-up)', 'LARGE_IMAGE_WIDTH','', 'The pixel width of large images (Pop-up)<br>(Use 0 for non-specific size)', 4, 32, now( ) , now( ) , NULL , NULL
HTH