fixed a bug from 0.76 version

git-svn-id: https://plugins.svn.wordpress.org/wpcu3er/trunk@899599 b8457f37-d9ea-0310-8a92-e5e31aec5664
fixed a bug from 0.76 version

git-svn-id: https://plugins.svn.wordpress.org/wpcu3er/trunk@899604 b8457f37-d9ea-0310-8a92-e5e31aec5664
fixed a bug from 0.77 version

git-svn-id: https://plugins.svn.wordpress.org/wpcu3er/trunk@899606 b8457f37-d9ea-0310-8a92-e5e31aec5664