[pmwiki-users] Site Attack?

[Allyen E. Wilson]

My pmWiki site went away! the pmwiki.php file and the wiki.d folder  
are both gone. I did not remove them. Is there a way someone can hack  
my site? It is a little innocuous wiki for communicating with clients  
no real cause to attract some evil doer.

I uploaded a pmwiki.php file and the page comes up but my custom  
sidebar and all client groups are gone.

How do you backup wikis? Dreamweaver never liked syncing my wiki so I  
do not have a backup of the site.

Thanks for any help you can offer.

Allyen