i can't change the number of categories per row

[novasonic]

Hello everybody, i have this issue
i can't change the number of categories per row, just i change 3 (default value) to 4 (value that i want)
in the configuration of virtuemart, templates tab , Default number of categories in a row  option .
What more i have to do? any idea?
regards.
Joomla version 2.5.2
Virtuemart version 2.0.2

[earthrat]

If you have set the default value and then created categories you will have to go into each category and change it to the new value. This is something that should be able to be changed site wide but it is not available.