Couldn't login the backoffice

I have just download the litecart and want test in my local first.

Every thing is ok with the install(the server check all is ok),but after it,couldn't open the backoffice and login,it is said""Server error!
The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there was an error in a CGI script.""

I am use xampp,and open the error.txt it is said""[Fri Jun 20 00:44:32.468750 2014] [core:alert] [pid 4224:tid 532] [client 127.0.0.1:2340] D:/Program Files/xampp/htdocs/litecart/admin/.htaccess: Invalid auth file type: Files/xampp/htdocs/litecart/admin/.htpasswd""

the frontoffice is works well.
so what is the issue,please?

thanks.

What does your ~/admin/.htaccess say?

What does your ~/admin/.htaccess say?

it is the full:

# Denied content
<FilesMatch ""\.(htaccess|htpasswd|inc.php)$"">
Order Allow,Deny
Deny from all
</FilesMatch>

# Basic authentication
<IfModule mod_auth_basic.c>
AuthType Basic
AuthName ""Restricted Area""
AuthUserFile D:/Program Files/xampp/htdocs/litecart/admin/.htpasswd
Require valid-user
</IfModule>

I have not edit any thing.It is generated automatically.

Try adding """" to the path:

AuthUserFile ""D:/Program Files/xampp/htdocs/litecart/admin/.htpasswd""

Try adding """" to the path:

AuthUserFile ""D:/Program Files/xampp/htdocs/litecart/admin/.htpasswd""

Thanks,it works!
Now can login the backoffice.