Here is the one I use,

/castsequence reset=4 Holy Shield, Hammer of the Righteous, Judgment of Wisdom, Shield of Righteousness, Consecration

Ideas off the top of my head...

Make sure you have mana,
Do you have a seal still up
Might check under Ret, and put at least one point in Improved judgements. ( dumped two in there myself.)

Outside of those things, I'm not sure man.

Stephen