Problems setting up LDAP service for 7420 appliance

Regards,
I am struggling setting up the LDAP service on our 7420s (running the latest 2011.04.24.3.0,1-1.19 SW). When I check the "cert from server" radio button and try to enable the service, I get these errors:

Appliance Type: Sun ZFS Storage 7420
Appliance Version: 2011.04.24.3.0,1-1.19
Browser Name: Netscape 5.0 (Windows)
Browser Details: Mozilla/5.0 (Windows NT 5.1; rv:14.0) Gecko/20100101 Firefox/14.0.1

Exception type: coXmlrpcFault
Native message: failed to connect to <IP>:389: error code 0x1408f10b
Mapped file: https://localhost:3810/lib/crazyolait/coError.js line 37
Mapped stack trace:

Native file: https://localhost:3810/lib/crazyolait/index.jshttps://localhost:3810/lib/crazyolait/index.js:370

Additional native members:
    faultCode: 80
    faultString: failed to connect to <IP>:389: error code 0x1408f10b
    coStack: coXmlrpcProxy.unmarshallDoc(doc:<object> "[object XMLDocument]", xml:"<methodResponse><fault>
<value><struct><member>
<name>faultCode</name>
<value><int>80</int></value>
</member>
<member>
<name>faultString</name>
<value><string>failed to connect to <IP>:389: error code 0x1408f10b</string></value>
</member>
</struct></value>
</fault></methodResponse>
")
coXmlrpcProxy.unmarshallResponse(response:<object> "[object Object]")
<anonymous>(response:<object> "[object Object]", null)
<anonymous>(r:<object> "[object Object]", e:null, cb:<function> "function (response) {\n    var result = null;\n    \