Unable to set default layout variant in POWL

Hi Experts

We have performed below activity in POWL_QUERY to assign default layout variant.

  1.  Choose Layout variant.

  2.  A browser window for the POWL_MASTER_QUERY appears.

  3.  Change the sap-config-mode from "X" to "config" within the URL.

  4.  Now you can define your layout variant and save your changes.

  5.  Log on to the Customizing client and start transaction POWL_QUERY.

  6.  Assign your created layout variant in the Layout selection field.

But Still I am not able to see selected layout.

I am using NWBC 4.0 and  NW - 7.02.

Please advice.

Regards,

Yogesh