Trouble installing 1.8

Well I can try. Can you give me a brief back ground of how you got to this point? Os version? Did you pass all the prerequisites?

Also just so you know, I had to tweak my .htaccess file a bit to get my test server to work correctly. Here is what i have at the moment. Keep in mind, this is for a test server, and there may be things configured in such a way that they should not be used in a production environment.

Options +FollowSymLinks
RewriteEngine On
RewriteBase /xibo18alpha/web/

RewriteCond %{HTTP:Authorization} .
RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]


# requests for api authorize
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_URI} ^.*/authorize/.*$
RewriteRule ^ api/authorize/index.php [QSA,L]

# requests that start with api go down to api/index.php
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_URI} ^.*/api/.*$
RewriteRule ^ api/index.php [QSA,L]

# install
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_URI} ^.*/install/.*$
RewriteRule ^ install/index.php [QSA,L]

# maintenance
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_URI} ^.*/maint/.*$
RewriteRule ^ maint/index.php [QSA,L]

# vendor
RewriteCond %{REQUEST_URI} ^.*/vendor/.*$
RewriteRule ^ ../vendor/ [QSA,L]

# all others - i.e. web
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^ index.php [QSA,L]