Backup not possible – "filename too long"

Hey,

can not make backups for a few days now. Always 4 errors with the notice that the filename is too long. I shorted the filename, but have still the same problem.

2012/12/19 06:59.10: [FEHLER] PCL ZIP Fehler “filename_too_long” bei der Datei /var/www/vhosts/tna-newsblog.de/httpdocs/wp_live_b8N7/wp-content/plugins/bwp-minify/cache/minify_jquery,upgrade,ajaxupload,superfish,hoverIntent,ocmx_jquery,multifile,jquery.lightbox0.5,depth_jquery,jquery.jplayer.min,selfhosted,shutterreloaded,jquery.cycle.all.min,ngg.slideshow.min.js_d9a5f1394eb304cf51a98c18cb404e10!

2012/12/19 06:59.10: [FEHLER] PCL ZIP Fehler “filename_too_long” bei der Datei /var/www/vhosts/tna-newsblog.de/httpdocs/wp_live_b8N7/wp-content/plugins/bwp-minify/cache/minify_jquery,upgrade,ajaxupload,superfish,hoverIntent,ocmx_jquery,multifile,jquery.lightbox0.5,depth_jquery,jquery.jplayer.min,selfhosted,shutterreloaded,jquery.cycle.all.min,ngg.slideshow.min.js_d9a5f1394eb304cf51a98c18cb404e10.gz!

2012/12/19 06:59.10: [FEHLER] PCL ZIP Fehler “filename_too_long” bei der Datei /var/www/vhosts/tna-newsblog.de/httpdocs/wp_live_b8N7/wp-content/plugins/bwp-minify/cache/minify_social_bookmarksmin,jquery.ui.core.min,jquery.ui.widget.min,jquery.ui.mouse.min,jquery.ui.draggable.min,jquery.ui.droppable.min,jquery.ui.sortable.min,jquery.ui.tabs.min,jquery.form.min,scripts.js_f0b06ee8d3ab81c720f46b369f7af45e!

2012/12/19 06:59.10: [FEHLER] PCL ZIP Fehler “filename_too_long” bei der Datei /var/www/vhosts/tna-newsblog.de/httpdocs/wp_live_b8N7/wp-content/plugins/bwp-minify/cache/minify_social_bookmarksmin,jquery.ui.core.min,jquery.ui.widget.min,jquery.ui.mouse.min,jquery.ui.draggable.min,jquery.ui.droppable.min,jquery.ui.sortable.min,jquery.ui.tabs.min,jquery.form.min,scripts.js_f0b06ee8d3ab81c720f46b369f7af45e.gz!

http://wordpress.org/extend/plugins/backwpup/