samsam and mahatmapoppins:
Have you implemented the rewrite-rules correctly? To do this you need to show hidden files in your ftp-program. Then you will find the .htaccess file in the root. Download it and edit it as in the description. Then you need to upload it using ASCII mode (NOT binar) into your pixelpost folder.
there is a good guid here:
http://www.javascriptkit.com/howto/htaccess.shtml
Good luck!