visit this site http://www.xml-sitemaps.com/ then enter your site link and click start.

Second step: adding sitemap.xml to your site

download sitmap.xml and upload it to the main root of your site, , the link of site map should be like that: www.your-domain.com/sitemap.xml

Third step: I) submit site map to bing:

here you have two choices: 1) go to Bing Webmaster Tools and sign in to add your file: www.your-domain.com/sitemap.xml

2) just visit this link after edit it by replace the last words of it:  http://www.bing.com/webmaster/ping.aspx?siteMap=SITEMAP-URL-HERE

II) adding site map to ask.com:

visit this url:  http://submissions.ask.com/ping?sitemap=http%3A//www.URL.com/sitemap.xml

after replace "URL" with the URL of your website.