Problems with Kraken Plugin

Hi,

I’m have the following problem:

when i was 20 users, the plugin worked perfectly, now with 150 users the plugin behaves strange , MSN button on the Spark does not work for multiple users that belong to the group of users free to use the gateway.

I´m work with Active Directory Groups, the group openfire_admin is allowed to use the gateway, but multiple users can not.

Openfire 3.6.4

Spark 2.5.8

Java 1.6.0_03 Sun Microsystems

Tanks for help.