Problemi di login

[marrieg]

al login dopo messo utente e password mi compare il seguente errore:
Warning: include_once(NGGALLERY_ABSPATHlib/ngg-db.php): failed to open stream: No such file or directory in /membri/marrieg/wp-content/plugins/nextgen-public-uploader/nextgen-public-uploader.php on line 127

Warning: include_once(): Failed opening 'NGGALLERY_ABSPATHlib/ngg-db.php' for inclusion (include_path='.:') in /membri/marrieg/wp-content/plugins/nextgen-public-uploader/nextgen-public-uploader.php on line 127

Fatal error: Class 'nggdb' not found in /membri/marrieg/wp-content/plugins/nextgen-public-uploader/nextgen-public-uploader.php on line 128

questo e succeso dopo aver attivato il plugin nextgen public upload
dovrei entrare tramite file zilla ftp come posso fare? non mi fa entrare!!!