thumbnails not resizing

i am building 2 websites and on one of my sites the thubnails resize ok but on the other they dont no matter what values I insert into the Image width and height menu option found in DISPLAY -> CONTENT MODULES -> Category NAME :


Can anyone help ?

Parameters for DIV
Image width px
Image height px
Type of item layout
Pane height px
Item box background color
Item box margin px
Item box border No Yes
Item box rounded corners No Yes
Text centered No Yes

thanks for the reply its been sorted now