Magento 1.9 - Promotions Conditions and Actions not showing

Question

I have a problem creating the promotion rules for magento, the Add button Conditions and Action does not work.. I click on it but nothing happens.. Has anyone ever gone through this?

Conditions:

Actions:

I tried to follow this step:

Catalog > Attributes > Manage Attributes > SKU Change "Use for Promo Rule Conditions" to "Yes"

But it did not work.. It's as if the click of the + button was not called, it does not open anything..

Any idea?

Answer 1

Problem solved!

System -> Configuration -> Advanced -> Developer -> JavaScript Settings -> Merge Javascript Files = No