In .htAccess URL rewrite is not working properly

See more:

PHP

Hi Every One,

I have three files in my project

1. index.php
2. file1.php
3. file2.php

and i have created a simple .htaccess file in run under the iss 7
url rewrite is working but i got a simple issue.

In .htaccess file

<br />
ErrorDocument 404 /404.php<br />
RewriteEngine on<br />
<br />
<IfModule mod_rewrite.c><br />
#RewriteRule (*)$ http://localhost:81/uniphp/{R:1}<br />
<br />
<br />
RewriteRule  ^/file/MyFile$ file1.php<br />
RewriteRule  ^/file/YourFile$ file2.php<br />

If I open my website and navigate the url is working fine but after navigate i want to move second url it append "file" keyword again.
Example

Navigate between Site

"Index.php to file/myfile"

"Url: http://localhost/file/myfile"

When I am in myfile page and i want to move your file page
then url 

URl: "http://localhost/file/file/yourfile"

So I want to display url only

"http://localhost/file/yourfile"

Please help to solve this issue.