Omeka Error

When I try and delete one of my test items, I get an error with this long message. I have no idea what this means, but I suspect it means there is something wrong with this item in the database. It is only this one item.

exception 'Omeka_Storage_Exception' with message 'Unable to delete
file.' in /home/ctevans/public_html/Slatington/project/application/libraries/Omeka/Storage/Adapter/Filesystem.php:153
Stack trace:
#0 /home/ctevans/public_html/Slatington/project/application/libraries/Omeka/Storage.php(66):
Omeka_Storage_Adapter_Filesystem->delete('files/04323fc50...')
#1 /home/ctevans/public_html/Slatington/project/application/models/File.php(232):
Omeka_Storage->__call(Array, Array)
#2 /home/ctevans/public_html/Slatington/project/application/models/File.php(232):
Omeka_Storage->delete('delete', Array)
#3 /home/ctevans/public_html/Slatington/project/application/models/File.php(238):
File->unlinkFile('files/04323fc50...')
#4 /home/ctevans/public_html/Slatington/project/application/libraries/Omeka/Record.php(622):
File->_delete()
#5 /home/ctevans/public_html/Slatington/project/application/models/Item.php(253):
Omeka_Record->delete()
#6 /home/ctevans/public_html/Slatington/project/application/models/Item.php(233):
Item->_deleteFiles()
#7 /home/ctevans/public_html/Slatington/project/application/libraries/Omeka/Record.php(622):
Item->_delete()
#8 /home/ctevans/public_html/Slatington/project/application/libraries/Omeka/Controller/Action.php(517):
Omeka_Record->delete()
#9 /home/ctevans/public_html/Slatington/project/application/controllers/ItemsController.php(149):
Omeka_Controller_Action->deleteAction()
#10 /home/ctevans/public_html/Slatington/project/application/libraries/Zend/Controller/Action.php(513):
ItemsController->deleteAction()
#11 /home/ctevans/public_html/Slatington/project/application/libraries/Zend/Controller/Dispatcher/Standard.php(295):
Zend_Controller_Action->dispatch()
#12 /home/ctevans/public_html/Slatington/project/application/libraries/Zend/Controller/Front.php(954):
Zend_Controller_Dispatcher_Standard->dispatch('deleteAction')
#13 /home/ctevans/public_html/Slatington/project/application/libraries/Zend/Application/Bootstrap/Bootstrap.php(97):
Zend_Controller_Front->dispatch(Object(Zend_Controller_Request_Http),
Object(Zend_Controller_Response_Http))
#14 /home/ctevans/public_html/Slatington/project/application/libraries/Zend/Application.php(366):
Zend_Application_Bootstrap_Bootstrap->run()
#15 /home/ctevans/public_html/Slatington/project/application/libraries/Omeka/Core.php(166):
Zend_Application->run()
#16 /home/ctevans/public_html/Slatington/project/admin/index.php(45):
Omeka_Core->run()
#17 {main}