base_url not working fine - Please help

[eluser]rogierb[/eluser]
Can you give some more info on you directory structure?
Is project/viewAllProjects your subdirectory?

if so, can you try:
RewriteEngine On
RewriteBase /project/viewAllProjects/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [L]

as your .htaccess