Fantastico problem !rep + who help me

Hello ,
I have big problem ...My friend have site on Joomla and he wanted from me to install wordpress on them and delete all info from that site he want full new site...He have site on webhostingpad hosting , and this is first domain on hosting . First i go on fantastico and click joomla 1.5 and remove joomla ...And then i go in ftp acc and in folder of his domain and delete all files and folders in there , now this is empty and when i go in fantastico and go to wp and install new , they say me " The installation can not be completed:- You cannot install more than one script in the root directory of a domain.

Click on the browser's Back button to fix reported errors. " :S but this is full empty please help ???

You didn't delete The right folders! This has happened to Me! It's been a While since I did this but I remember deleting every file! sorry if it doesn't help much :/

:/ any way to fix it ? :S or something ?

Maybe send an email to the hosting company tech support?

If you trust me, give me your details and I'm going to fix that for FREE

Thanks for helping i found where is problem and fix it