I'm using Advanced Custom Fields and trying to create a field with the [field type Repeater](http://www.advancedcustomfields.com/docs/field-types/repeater/#creating-a repeater-field).
But the problem is that the Repeater option doesn't appear in the select list with the field types. I can't figure out what's wrong.
I'm using Advanced custom fields v3.5.3 and Wordpress 3.4.2.
What could be the issue?