I am developing a program to auto post to a wordpress site using xml-rpc for someone. I have copied their entire site except for the database locally. When I test the program using that local site, it works perfectly. But when I test it on the live site, the response from the server returns empty.
After some more testing, I have found that the server responds fine when the response is an error (eg wrong username/password) and it only returns blank when it is writing to the database (eg calling using wp.newPost wp.editPost).
What could be causing this? I know it is not my program because I have tested this with other programs and the same thing happens every time with all of them. We have also tried disabling all of the installed plugins and trying, but the same thing happens with all plugins disabled.