Problem using Server Plesk 11.x.x

Hi,
i use actual Plesk Server (3 Server with WHMCS)
and i get a Problem by using it.

I have added all Server correct to WHMCS and i can access it from WHMCS Server (test after add the Server)

But i get
1.) no Server in the List of Servers, if i want add a Client and a Product.
2.) get this Error by using Function create..

Fatal error: Uncaught SoapFault exception: [SOAP-ERROR: Parsing WSDL: Couldn't load from 'https://:2443/nodeworx/soap?wsdl' : failed to load external entity "https://:2443/nodeworx/soap?wsdl" ] 0 in /var/www/vhosts/domain.de/domain-internet.de/includes/classes/WHMCS/Terminus.php:0 Stack trace: #0 /var/www/vhosts/domain.de/domain-internet.de/includes/classes/WHMCS/Terminus.php(0): WHMCS_Terminus::whmcsExceptionHandler() #1 [internal function]: WHMCS_Terminus->whmcsExceptionHandler(Object(SoapFault)) #2 {main} thrown in /var/www/vhosts/domain.de/domain-internet.de/includes/classes/WHMCS/Terminus.php on line 0

do you have here any Ideas to solve this Problem ?

Regards Kasi