You're not telling what protocol (application) needs to be balanced so that makes it a bit harder to answer your question.
But configuration can be done using the following steps:
Configure L2/L3 and Admin access:
ACE communicates using VLANs. Best option is to (port)channelize the 4 ethernet ports to the switch carrying your client-vlan (L3 vlan) and server-vlan (L2 only!). You also assign a fault tollerant vlan (FT-vlan) which is used by ACE to replicate sessions and for configuration synchronisation. You will need to configure this with both ACE Admin contexts. Configure ACE to accept traffic towards the ACE (for management etc.
And next you may want to set up a user context and configure this one for your loadbalancing. Don't forget to allow traffic using an access-list (else implicit deny all...)
Attched are a few examples for both ACE's (redundant) where I did not use port-channel connectivity however. These confs show Web (HTTP and HTTPS) using persistence (sticky), FTP and Telnet LAB-examples
Please let me know if you still have questions.