Ignore Sub-Domains ?

[GravityFX]

Hello, I am having trouble using my sub-domains of directories. Is there a way to ignore specific sub-domains or directories ? This is my .htaccess file:

 

IndexIgnore *

RewriteEngine on

# Prevent viewing of .htaccess file
<Files .htaccess>
  order allow,deny
  deny from all
</Files>

# Short URLs   
  RewriteRule ^([^\.]+)$ index.php?p=$1 [L]

 

I need to fix "Short URLs" part ;-) I've created sub-domain http://blog.gravityfx.org/ but when I logging to my blog I get to http://blog.gravityfx.org/wp-admin/ instead of http://blog.gravityfx.org/wp-admin/index.php Also when I use sub-domain like so: http://gravityfx.org/blog/ it does not work, it says error 404 - not found. Now I've created sub-domain > http://wiki.gravityfx.org/ and it says Not Found. Please help. Thanks!

[GravityFX]

The http://gravityfx.org/blog/index.php Works, but when I use http://gravityfx.org/blog/ It gives me error 500.