Remove Subcategory images from Subcategory Pages

Hi,

I am facing a problem that on my category page the subcategory images are showing which is fine. But these images are also showing on subcategory pages. Which i dont want. Can anyone please help me over this issue.
Link to my main category page: http://www.maginn.ie/index.php?route=pr ... ry&path=59
Link to Sub Category: http://www.maginn.ie/index.php?route=pr ... ath=59_149

Thanks in advance