How to get BW variables to use long text in Webi prompt? (using BICS)

I have a Webi report created from a BW query and I would like to allow users to use the long description on the LOV search / prompts screen.

Example:

Cost Center Master data in ECC

Cost Center Number: 123

Cost Center Short Description: "Inf Mgmt"

Cost Center Long Description: "Information Management"

Variable is created on the BW query.

In the Webi report, when I refresh the list of values  I only see the short description "Inf Mgmt" and If I search by the long description I get no results.

I am using BI 4.0 SP4, BW 730.

Setting on Business Explorer - RSD1:

thank you for any feedback

Rodrigo Silva