[Plugin: WordPress Backup to Dropbox] Load averages increase

Hi all, I installed this plug in but when I tried running it for the first time it caused my server load averages to increase from around 0.3 to 10+. I left it for 60 minutes but the load averages hadn’t decreased and it hadn’t nothing was in the backup directory it had created in my Dropbox.

Any ideas what’s going on here?

Cheers.

http://ww.wp.xz.cn/extend/plugins/wordpress-backup-to-dropbox/