I have just setup WFDownloads on my local server and have had the same problem but after reading this thread and changing the category.php to the one in post 17 i now get the following error

INSERT INTO xoops_wfdownloads_cat( pid, title, imgurl, description, nohtml, nosmiley, noxcodes, noimages, nobreak, weight, spotlighttop, spotlighthis )
VALUES ( 0, 'Multi Media', 'XPC.jpg', 'Audio Video Apps', '', '', '', '', '1', '0', 0, 0 )

MySQL said:
#1364 - Field 'summary' doesn't have a default value

Can you please help me with this i am using php 5 and MySQL 5 running on abyss 2 server thanks in advance