URL Rewiting Issue in asp.net

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ASP.NET

C#5.0

WebConfig

I have written below lines in `web.config` for url rewriting.

1) rewrite url="^/Results/(.+)/(.+)/Images" to="~/Directory.aspx?l=$1&t=$2&i=1" processing="stop" />

2) rewrite url="^/Results/(.+)/(.+)$" to="~/Directory.aspx?l=$1&t=$2" processing="stop" />

3) rewrite url="~/Results/(.+)/Images" to="~/Directory.aspx?l=$1&i=1" processing="stop" />

Inside `Directory.aspx.cs`:

string Location = string.IsNullOrEmpty(Request.QueryString["l"]) ? "" : Request.QueryString["l"];

string TextPhrase= string.IsNullOrEmpty(Request.QueryString["t"]) ? "" : Request.QueryString["t"];

bool WithImages = string.IsNullOrEmpty(Request.QueryString["i"]) ? false : true;

Now: when I send requests to `Directory.aspx` page, by providing appropriate query strings.
point 1 and 2 are working fine but when I send request with query strings to full fill condition in point 3, it does not seem to be working and `Dictionary.aspx.cs` processes the query strings like,

http://werbsiteaddress.com/Results/US/Images

Location = string.IsNullOrEmpty(Request.QueryString["l"]) ? "" : Request.QueryString["l"]; // US

TextPhrase= string.IsNullOrEmpty(Request.QueryString["t"]) ? "" : Request.QueryString["t"]; // Images

bool WithImages = string.IsNullOrEmpty(Request.QueryString["i"]) ? false : true; // false

Please help me out and let me know if I am missing something.

Thanks.