Url not found error while using Permalink in wordpress

[iMezied]

I am new to WordPress. I was implementing a website and while doing so I am getting an error.Actually I was trying to change a link as a \[code\]page name\[/code\] , that is instead of id I am displaying name of the link.This is implemented by Permalink.But while doing so I am getting \[code\]Url Not Found\[/code\] error.When I change Permalink back to \[code\]id (default)\[/code\] from name it is displaying the same page.Actually I want to implement this with \[code\]Permalink\[/code\] in \[code\]Page Name\[/code\] format.So can anyone suggest any plugin or any help which will help me implement this ?