admin url not found??? Please help!!!

[SooCharming]

I have installed prestashop using softaculous, and I can view the store front, but can not access the admin account... I have removed and reinstalled everything countless times and I get the same error each time I try to follow my admin link... I have no clue whats wrong or how to fix it.
Here is my installation message
Congratulations, the software was installed successfully

PrestaShop has been successfully installed at :
http://soo-charming.com/presta
Administrative URL : http://soo-charming.com/presta/admin

and the error I get when trying to acess my admin url

Not Found
The requested URL /presta/admin was not found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.


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Apache/2.2.14 (Unix) mod_ssl/2.2.14 OpenSSL/0.9.8e-fips-rhel5 mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635 Server at soo-charming.com Port 80

Can someone PLEASE tell me how to fix this?!?!?!