mysql - wordpress's dbDelta function stopped working -

I am developing a WordPress plugin that requires database interoperability. I am using DBDLTA function in my active hook to add multiple tables to the database. dbDelta functioning last week was , but when I was adding another table today nothing happened I used to add columns or change the properties of existing tables was not able. Someone suggested to break SQL commands before running dbDelta, but it does not work either.

Before you ask: Yes, I have read the codex page and have followed the formatting instructions.

Here's the code:

  & lt ;? Php function installs () {global $ wpdb; // Global variables use WPDB, a class / db prefix that is used to interact with the database of WordPress $ gist_table = $ wpdb- & gt; Defines table names using prefix. "Cookbook_gist"; $ Tag_table = $ wpdb- & gt; Prefix "cookbook_tags"; $ TagKey_table = $ wpdb-> Prefix "cookbook_tagKeys"; $ Comment_table = $ wpdb-> Prefix "cookbook_comments"; $ Blacklist_table = $ wpdb- & gt; Prefix "cookbook_blacklist"; // include wpdb function require_once (ABSPATH. 'Wp-admin / include / upgrade.php'); // DBDLTA function is in this file // Create SQL statement to add table $ sql = "subscribe table $ gist_table (gist_id mediumint, zero, last stored datetime, '0000-00-00 00:00:00' No, Last_Arrited Date Time Lapse '0000-00-00 00:00:00' No, author, not a small reader, the description is not medium text, the title is not secondary text, body text, pastor media text, zero, primary key (gist_id )), "; // Really add table dbidilta ($ sql); $ Sql ​​= "Creating a table $ tag_table (Tag_id MediaType not tap AUTIGMENT, tag TinyTextNull, Primary key (tag_ID));"; DbDelta ($ SQL); $ Sql ​​= "Host $ Tablet Tag (ID Secondary Not AUTOCCCment, GISID Media Device Null, Tag_ID MediaMet Faucet, Primary Key (ID));"; DbDelta ($ SQL); $ Sql ​​= "Create table $ comment_table (id is secondary, not zero, gist_id is not secondary, author, not small reader, not dated as of date, zero, at least medium text, zero, new key text not primary Key); "; DbDelta ($ SQL); $ Sql ​​= "Make Tablet $ blacklist_table" (gist_id is not secondary, primary key (gist_id)); "; DbDelta ($ SQL); // changes WP database?}? & Gt; Sorry for the confusion  
 
 My hosting service hosted on the server a few days ago went; And I was still logging on the old server to manage the database. When I logged on to the correct server, the changes were expected.