url rewriting with response.sendRedirect(response.encodeRedirectURL(url))

Question

I want to encode my query string parameters from the url but i'm not getting any effects of url rewriting for your kind info i m doing it using rewrite.properties.

I am using response.sendRedirect(response.encodeRedirectURL(url)) but not getting any effect of it

and i wrote in rewrite.properties file like:

RewriteCond %{QUERY_STRING} ^action=DashBoard
RewriteRule ^(.*)$ /servlet/abc?action=somevalue [L,QSA] 

Is it related with any browser's issues? If so using ie8.