When creep enter region set mana +1

[SsBloodY]

Its about this problem http://hiveworkshop.com/forums/showthread.php?t=36319
I thought of solution but got another problem well the Title tells it all
I want when a creep enter some region to add 1 mana (mana + 1 )

 

[Eleandor]

• Untitled Trigger 001
  • Events
    • Unit - A unit enters (region 001)
  • Conditions
    • (Owner of (Entering unit)) Equal to Neutral Hostile
  • Actions
    • Unit - Set mana of (Entering unit) to ((Mana of (Entering unit)) + 1.00)