Ask.com makes if very VERY easy to submit your XML sitemap for proper indexing of your web site. The URL you have to enter is:
http://submissions.ask.com/ping?sitemap=http://www.YourWebSite.com/sitemap.xml

Copy and paste this URL in to your browser and replace “yoursitemapURL.xml” with your XML sitemap URL. That’s it!! You should get a confirmation page from Ask telling you that your sitemap has been submitted.

One interesting note to point out is that if you try to just go to the core URL. (submissions.ask.com) this is not a valid page and will not render in your browser.

Ask.com does not have any formal login page that allows you to review your submission and make sure they accepted it without any error. My recomendation is to submit your XML sitemap to Google for a few days first. If Google likes it, and you have no issues with Google then you are probabbly safe to submit the XML file to Ask.com as well.