Bing Webmaster Tools failed to reach sitemap any suggestions?

[EcommerceSite]

My sitemap has been submitted to Bing webmaster tools well over a year ago and I have never had any problems. Starting last week it showed failed, for some reason it can't reach it. I have resubmitted several times and it fails every time. I can go to the url with no problems, and Google Webmaster Tools does not have any problems. We have made no changes in over a year to how the sitemap is made and submitted. Anyone have any ideas?

[TakeshiYoung]

I've had trouble with Bing submissions before. In our case, our firewall had blocked one of the Bing-bots from accessing our sitemap. The Bing IP we were blocking was 131.253.38.67, although it could be other IPs as well. Also, make sure you're not blocking Bing-bot through your robots.txt. It could also be an issue with Bing WMT itself, in which case I would just post a ticket to their customer support. They should respond back to you within a couple days.

[Christy-Correll]

Hi there, has your question been resolved? We would love an update, thanks!

Christy