Transfer not completed

Help please, can’t make backup to dropbox

Log:

[2013-07-09 2:51:02 pm] *** wpTimeMachine plugin loaded 3.0.10 ***
[2013-07-09 2:51:02 pm] --- System / Environmental Checks:
[2013-07-09 2:51:02 pm] ---     WordPress: 3.5.2
[2013-07-09 2:51:02 pm] ---     WP_ALLOW_MULTISITE: true
[2013-07-09 2:51:02 pm] ---     DOMAIN_CURRENT_SITE: DOMAIN_CURRENT_SITE
[2013-07-09 2:51:02 pm] ---     PATH_CURRENT_SITE: PATH_CURRENT_SITE
[2013-07-09 2:51:02 pm] ---     SITE_ID_CURRENT_SITE: SITE_ID_CURRENT_SITE
[2013-07-09 2:51:02 pm] ---     DOMAIN_CURRENT_SITE: BLOG_ID_CURRENT_SITE
[2013-07-09 2:51:02 pm] ---     Browser: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/27.0.1453.116 Safari/537.36
[2013-07-09 2:51:02 pm] ---     PHP: version 5.3.23
[2013-07-09 2:51:02 pm] ---     cURL: version 7.21.0
[2013-07-09 2:51:02 pm] ---     wp-content writable: yes
[2013-07-09 2:51:02 pm] ---     Current Offsite Provider: dropbox
[2013-07-09 2:51:02 pm] --- Start to generate archives...
[2013-07-09 2:51:02 pm] ---     wpTimeMachine-content-files.tar.gz, will contain:
[2013-07-09 2:51:02 pm] ---          add: wp-content/index.php
[2013-07-09 2:51:02 pm] ---          add: wp-content/plugins
[2013-07-09 2:51:02 pm] ---          add: wp-content/languages
[2013-07-09 2:51:02 pm] ---          add: wp-content/wpTimeMachine_log.txt
[2013-07-09 2:51:02 pm] ---          add: wp-content/themes
[2013-07-09 2:51:02 pm] ---          add: wp-content/advanced-cache.php
[2013-07-09 2:51:02 pm] ---          add: wp-content/popup-domination
[2013-07-09 2:51:02 pm] ---          add: wp-content/uploads
[2013-07-09 2:51:02 pm] ---          add: wp-content/backup-cdd02
[2013-07-09 2:51:02 pm] ---          add: wp-content/wpTimeMachine_options.php-old
[2013-07-09 2:51:02 pm] ---          add: wp-content/wp-cache-config.php
[2013-07-09 2:51:02 pm] ---          add: wp-content/wpTimeMachine_options.php
[2013-07-09 2:51:02 pm] ---          add: wp-content/cache
[2013-07-09 2:51:02 pm] ---          add: wp-content/backup-db
[2013-07-09 2:51:02 pm] ---          add: wp-content/setup.txt
[2013-07-09 2:51:02 pm] ---          add: wp-content/backupsindex.php
[2013-07-09 2:51:02 pm] ---          add: wp-content/backups
[2013-07-09 2:55:13 pm] ---     wpTimeMachine-htaccess.txt (copy of .htaccess file)
[2013-07-09 2:55:13 pm] ---     wpTimeMachine-Instructions.txt (text instructions)
[2013-07-09 2:55:13 pm] ---     wpTimeMachine-RestorationScript.sh (restoration shell script)
[2013-07-09 2:55:13 pm] ---     wpTimeMachine-data-files.sql (MySQL dump, for tables that begin with: "mp_")
[2013-07-09 2:55:13 pm] --- Initiate transfer to dropbox
[2013-07-09 2:55:13 pm] --- Instantiate new DropboxUploader()
[2013-07-09 2:55:13 pm] --- files loop: /nfs/c05/h04/mnt/83287/domains/roma.net.ua/html/wp-content/wpTimeMachine-content-files.tar.gz >> /wpTimeMachine >> wpTimeMachine-content-files.tar.gz
[2013-07-09 2:55:14 pm] --- error w/ DropboxUploader(): exception 'Exception' with message 'Upload failed!' in /nfs/c05/h04/mnt/83287/domains/roma.net.ua/html/wp-content/plugins/wp-time-machine/includes/DropboxUploader.php:92
Stack trace:
#0 /nfs/c05/h04/mnt/83287/domains/roma.net.ua/html/wp-content/plugins/wp-time-machine/includes/wpTimeMachineCore.php(870): DropboxUploader->upload('/nfs/c05/h04/mn...', '/wpTimeMachine')
#1 [internal function]: wpTimeMachine_init('')
#2 /nfs/c05/h04/mnt/83287/domains/roma.net.ua/html/wp-includes/plugin.php(406): call_user_func_array('wpTimeMachine_i...', Array)
#3 /nfs/c05/h04/mnt/83287/domains/roma.net.ua/html/wp-admin/admin.php(151): do_action('settings_page_w...')
#4 /nfs/c05/h04/mnt/83287/domains/roma.net.ua/html/wp-admin/options-general.php(10): require_once('/nfs/c05/h04/mn...')
#5 {main}
[2013-07-09 2:55:14 pm] --- Transfer not completed
[2013-07-09 2:55:14 pm] --- 252 seconds to execute entire process

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