New Codeigniter site problems

[eluser]chicoNERD[/eluser]
hi, i am new to this forum and i new to codeigniter.

i was building a website using codeigniter and everything is working
fine in the local testing server.
However, when i uploaded the site the server the links die.
i can click on any link and it just show the first page.
the link in the address bar change, but the page still the same.

is it something different that must be done before a live website?
i have the htaccess file and everything in the right place.