Loki's Staff, Failed to proc?

[Snowae107]

If you watch this video it fails to proc on my 2nd attack? can anyone explain this?
Snowae s107.

It's says when attacking or casting skills, and i attacked (although the enemy dodged) i still met the quota for the description to recieve the 12% heal.

http://s107-loa.r2games.com/share.ph...6539168f8a712e

[AE86]

Your attack was dodged