You need to add the license file for AVC, WSE and IPS via the Prime Security Manager (PRSM) interface - not using activation-key method which applies only to base ASA features.
PRSM is used in either "on-box" (single device) mode which allows you to log into the CX module and configure features directly or as a separately licensed "off-box" (mullti device mode) installation which is used to manage several ASAs' CX modules (and optionally the base ASAs).
First setup the CX module per the Quick Start Guide.
Then refer to the End User Guide for details on using the PRSM user interface and applying licenses.