I'm using Phonegap to build an application for multiple platforms, one of which is windows phone.
I had a similar problem with other platforms with having Ajax grab content from an XML file on the web.
I was able to solve it by adding ...
<access origin="*" />
to the config.xml file.
After that it worked on BlackBerry, Android, and IOS.
But on the windows phone emulator it doesn't fetch the data.
According to this page http://docs.phonegap.com/en/1.9.0/guide_whitelist_index.md.html Windows phone doesn't even need the Access tag and all domains should be accessible by default.
Copyright Notice：Content Author:「Philip Kirkbride」，Reproduced under the CC 4.0 BY-SA copyright license with a link to the original source and this disclaimer.
Link to original article：https://stackoverflow.com/questions/11584040/phonegap-with-windows-phone-access-origin