[Users] egine-iso-uploader error

Hello everybody, I have been able to solve my NFS problems and now I have configured ISO resource and a data resource in datacenter but when I try to execute the command "engine-iso-uploader" I can see below error: [root@ovirt-engine ~]# engine-iso-uploader -v list Please provide the REST API password for the admin@internal oVirt Engine user (CTRL+D to abort): ERROR: [ERROR]::ca_file (CA certificate) must be specified for SSL connection. INFO: Use the -h option to see usage. DEBUG: Configuration: DEBUG: command: list DEBUG: Traceback (most recent call last): DEBUG: File "/bin/engine-iso-uploader", line 931, in <module> DEBUG: isoup = ISOUploader(conf) DEBUG: File "/bin/engine-iso-uploader", line 331, in __init__ DEBUG: self.list_all_ISO_storage_domains() DEBUG: File "/bin/engine-iso-uploader", line 381, in list_all_ISO_storage_domains DEBUG: if not self._initialize_api(): DEBUG: File "/bin/engine-iso-uploader", line 358, in _initialize_api DEBUG: password=self.configuration.get("passwd")) DEBUG: File "/usr/lib/python2.7/site-packages/ovirtsdk/api.py", line 78, in __init__ DEBUG: debug=debug DEBUG: File "/usr/lib/python2.7/site-packages/ovirtsdk/infrastructure/connectionspool.py", line 47, in __init__ DEBUG: debug=debug)) DEBUG: File "/usr/lib/python2.7/site-packages/ovirtsdk/web/connection.py", line 38, in __init__ DEBUG: timeout=timeout) DEBUG: File "/usr/lib/python2.7/site-packages/ovirtsdk/web/connection.py", line 102, in __createConnection DEBUG: raise NoCertificatesError DEBUG: NoCertificatesError: [ERROR]::ca_file (CA certificate) must be specified for SSL connection. I have one Fedora 17 oVirt engine 3.1 installed with a Fedora 17 host. Someone can show me what is the problem and how is it solved, please? Many thanks in avanced, Juanjo.