Another PDOException error...

PDOException: SQLSTATE[42S22]: Column not found: 1054 Unknown column 'read_only' in 'field list': SELECT rid, read_only FROM {chatroom_role} WHERE cid = :cid; Array ( [:cid] => 2 ) in Chatroom->loadAllowedRoles() (line 91 of /home/example/public_html/sites/all/modules/chatroom/chatroom.chatroom.inc).
At least one similar error has been reported for this module. I want to add that this is the error I get when I click on the Main Menu tab of the chat room. It is also the error I get when I try to access the site's Content.
I cannot access the site's content to delete the chat room content. I cannot disable the module even after I delete the chatroom tables in the database.
Even when manually removing the field_chatroom from the content type and then from the field list, I still cannot deactivate the module and see the follwing message next to it: Required by: Drupal (Field type(s) in use (no link to field list anymore.)
Once I have deleted the field, I gain access to the Content list and can delete the Chat room content.
Depite the field, content, and content type deleted, I still cannot deactivate the chatroom module as it still claims Required by: Drupal (Field type(s) in use.
Any other suggestion to completely remove the module and try re-installing it?
Any help greatly appreciated. Thank you.