APM with OpenLDAP

Hi,

I want to test the APM module in my lab. I can authenticate from OpenLDAP when I login the F5. So my OpenLDAP is working. Now I configure the APM and use my OpenLDAP server as a authentication server. After configuration when I want to authenticate via access profiles it is not working. I'm getting following error in "Access Policy-->Reports-->General reports-->all Messages". How can I fix the auth problem?

24.6.2015 17:538126386BUsername 'uguler' 24.6.2015 17:538126386BLDAP module: authentication with '' failed: Can't contact LDAP server, base: scope: 2 filter: (-1) 24.6.2015 17:538126386BReceived User-Agent header: Mozilla%2f5.0%20(Windows%20NT%206.3%3b%20WOW64)%20AppleWebKit%2f537.36%20(KHTML%2c%20like%20Gecko)%20Chrome%2f43.0.2357.130%20Safari%2f537.36. 24.6.2015 17:538126386BReceived client info - Type: Mozilla Version: 1 Platform: Win CPU: unknown UI Mode: Full Javascript Support: 1 ActiveX Support: 0 Plugin Support: 1 24.6.2015 17:538126386BNew session from client IP 10.128.10.1 (ST=/CC=/C=) at VIP 10.128.10.20 Listener /Common/http_virtual (Reputation=Unknown) 24.6.2015 17:5217A75394Session statistics - bytes in: 7193, bytes out: 49931 24.6.2015 17:5117A75394Session deleted due to user logout request. 24.6.2015 17:5117A75394Username 'uguler' 24.6.2015 17:5117A75394Retry Username 'uguler' 24.6.2015 17:5117A75394LDAP module: authentication with '' failed: Can't contact LDAP server, base: scope: 2 filter: (-1) 24.6.2015 17:5117A75394Following rule 'fallback' from item 'LDAP Auth' to ending 'Deny' 24.6.2015 17:5117A75394Access policy result: Logon_Deny 24.6.2015 17:5017A75394Username 'uguler' 24.6.2015 17:5017A75394Retry Username 'uguler' 24.6.2015 17:5017A75394LDAP module: authentication with '' failed: Can't contact LDAP server, base: scope: 2 filter: (-1)