Thread:Project:Support desk/Can no longer upload files

I really need help here. I've had mediawiki install for almost a year. All is good, but today, image uploading stopped working. When I hit submit, I get this at the top of the page: Warning: wfMkdirParents: failed to mkdir "D:\Hosting\10143616\html\wiki\images\f\fb" mode 0777 in D:\Hosting\10143616\html\wiki\includes\GlobalFunctions.php on line 2582

And I get this upload warning: Could not create directory "mwstore://local-backend/local-public/f/fb".

Here's my version info: MediaWiki	1.21.1 PHP	5.3.6 (cgi-fcgi) MySQL	5.0.96-log

I'm hosted in a shared account on godaddy.com. The server is Windows. I need help diagnosing and solving this problem. Thanks!