Google Gadget - Caja is not working

Google Gadget - Caja is not working

I am working on a google gadget that needs to display data from another
php page inside gadget.
I tried using XMLHttpRequest and then came to know that gadget does not
allow it. So tried Caja. When I add caja tags in my gadget's XML file, my
gadget disappears and then it takes hours to re-appear (after I remove
caja tags). How to make gadget cajoable ? Any help on this will be greatly
appreciated.
Thanks.