Can't change level or add a user

(somehow this got posted on the wrong forum, hopefully this is the right one)

Hi, I’m using WordPress 3.6 on Windows Azure, I migrated the site from a centOS server and everything works fine, except trying to add the user to a plan fails:

1.- I manually add a new user to WordPress, that is working.
2.- I go to edit their profile to assign them on a plan level, I click update, the page says “User updated”, but they don’t change level, the message at the bottom says “User is not paying.”

3.- Also, I tried to change an old test user from plan A to plan B and on update now they appear as not subscribed.

Any ideas how to fix this?

I’m using:
Wordpress 3.6
I disabled all plugins, still it doesn’t work.
Paid Memberships Pro 1.7.2.1 just updated it, don’t know if before the update this worked.
.NET 4.5 (can be changed to 3.6)
PHP 5.4 (can be changed to 5.3 or be turned off)

Thanks.

http://wordpress.org/plugins/paid-memberships-pro/