Backup fails

Online Backup for WordPress Plugin Version 2.2.18
WordPress Version: 3.5.1
PHP Version: 5.3.20
MySQL Server Version: 5.5.25-cll
MySQL Client Version: 1.0
Mem: 128M; Post: 64M; Upload: 64M; Timeout: 30
End of Information

Attempt 1:

A filesystem operation failed while processing ‘Filesystem/public_html/site/Video/HD-Vancity.oggtheora.ogv’ (Size unknown) for backup.
If the following error message is not clear as to the problem and the issue persists, please contact support providing the complete event log for the activity. Diagnostic information follows:

Failed at: 985(/home/nakal682/public_html/wp-content/plugins/wponlinebackup/include/files.php)
An error happened at: compressor_deflate.php(411)
filesize(): stat failed for /tmp/obfw4d9xZf

Attempt 2:

The backup failed: An error happened at: disk.php(163)
fopen(/home/nakal682/public_html/wp-content/plugins/wponlinebackup/tmp/full/backup.zip.enc.php): failed to open stream: No such file or directory

Attempt 3:

A filesystem operation failed while processing ‘Filesystem/public_html/site/Video/HD-Vancity.webmsd.webm’ (Size unknown) for backup.
If the following error message is not clear as to the problem and the issue persists, please contact support providing the complete event log for the activity. Diagnostic information follows:

Failed at: 985(/home/nakal682/public_html/wp-content/plugins/wponlinebackup/include/files.php)
An error happened at: compressor_deflate.php(411)
filesize(): stat failed for /tmp/obfwQFg0FE

Attempt 4:
Tried to exclude the .webm file, figuring it might be too big. Bogged down still. I stopped backup after 15 min

Attempt 5:
Tried to exclude the entire folder holding video files: site/Video (Do I need to put the slash in front of the folder name, or any wildcards?)

Failed at: 985(/home/nakal682/public_html/wp-content/plugins/wponlinebackup/include/files.php)
An error happened at: compressor_deflate.php(411)
filesize(): stat failed for /tmp/obfwbI5v4z

Failed at: 985(/home/nakal682/public_html/wp-content/plugins/wponlinebackup/include/files.php)
An error happened at: compressor_deflate.php(411)
filesize(): stat failed for /tmp/obfwnKrT6X

File system backup completed.

The backup failed: An error happened at: disk.php(545)
fopen(/home/nakal682/public_html/wp-content/plugins/wponlinebackup/tmp/full/cdrbuffer.php): failed to open stream: No such file or directory

Failed at: 985(/home/nakal682/public_html/wp-content/plugins/wponlinebackup/include/files.php)
An error happened at: disk.php(607)
fopen(/home/nakal682/public_html/wp-content/plugins/wponlinebackup/tmp/full/encbuffer.2.php): failed to open stream: No such file or directory

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