pick up / drop items

[Klipso]

ive been working on this all morning and still got me stumped,

-hero has item A,
-hero picks up item B
-picking up item B causes item A to drop out of invintory

how can i get something like this to work?, it looks simple, but i cant seem to figure it out

 

[Pharaoh_]

• Trigger
• Events
  • Unit - A unit acquires an item
• Conditions
  • (Item-type of (Item being manipulated)) Equal to Item B //Item-type comparison
  • ((Triggering unit) has an item of type Item A) Equal to True //Boolean Comparison
• Actions
  • Hero - Drop (Item being manipulated) from (Triggering unit)

 

[Dr. Boom]

• Trigger
• Events
  • Unit - A unit acquires an item
• Conditions
  • (Item-type of (Item being manipulated)) Equal to Item B //Item-type comparison
  • ((Triggering unit) has an item of type Item A) Equal to True //Boolean Comparison
• Actions
  • Hero - Drop (Item being manipulated) from (Triggering unit)

Wouldn't this drop item B if you pick it up?

== Try this ==

• Test
  • Events
    • Unit - A unit Acquires an item
  • Conditions
    • (Item-type of (Item being manipulated)) Equal to Claws of Attack +15
    • ((Hero manipulating item) has an item of type Crown of Kings +5) Equal to True
  • Actions
    • Hero - Drop (Item carried by (Hero manipulating item) of type Crown of Kings +5) from (Hero manipulating item)