Call to undefined function ldap_servers_get_servers() ...\sites\all\modules\ldap_servers\ldap_servers.install on line 778

Host is IIS 7.5.

After putting the LDAP modules into /sites/all/modules and running update.php, I get the following error:

An AJAX HTTP error occurred. HTTP Result Code: 200 Debugging information follows. Path: https://url.omitted/online/update.php?op=selection&token=I-_E6X0sC2lqUhY... StatusText: OK ResponseText: Fatal error: Call to undefined function ldap_servers_get_servers() in E:\inetpub\tldomitted\online\sites\all\modules\ldap_servers\ldap_servers.install on line 778