Unknown Error To Me

[Guest]

I just installed a Stocked OSC Ebook Store, that I purchased from EBAY

And when I log into the Admin Section then I click on Banner Manager and I get this error.

 

Warning: imagepng() [function.imagepng]: Unable to open 'images/graphs/banner_infobox-4.png' for writing in /home/houseofe/public_html/admin/includes/classes/phplot.php on line 473

 

Does anyone knows what it means and how I can fix this ?

[dmnalven]

http://www.oscommerce.info/kb/osCommerce/I...nd_Upgrades/224