Got problems on link the page or classes

[eluser]ebot[/eluser]
i am building a blog using CI, and i tried linking the home page to other but everytime i click on an anchor there is also a message that the page i am looking for is not found on the server, and also for my graphics, i can't display the iamge on the view,
always got a message of appliaction model, i don't understand, please need help.
Thanks