I have one issue...could be .htaccess problem?

[eluser]stdio[/eluser]
Hello,

A friend of mine installed codeigniter on my website (www.smsup.net). It used to work perfectly until I had to move my website to another host. Now, all the links are taking me to the main website. Could this be a .htaccess problem? Any ideas how can I fix it?

Thank you!