Thanks you all for your precious suuport.I found a link that can help in this without integrating with any thing. I though to send it to you all in case you need this in the future.http://www.cisco.com/en/US/docs/net_mgmt/cisco_secure_access_control_...
If you cab just tell me what's appearing in the consle monitor...any syslog message.and you can increase the RAM and try...I had the same problem but i didn't increase the RAM yet. If i do it soon i will tell you the result.