[FLOW3-general] Help me! Class 'XMLWriter' not found in ...XmlWriter.php on line 31.

[mario chiari]

Hi

I am just trying to get into FLOW3. 
I am trying to install it on my localhost and got my first error msg:

[root at localhost flow3]# ./flow3 kickstart:package MyMario.MyProvauno
PHP Fatal error:  Class 'XMLWriter' not found
in /var/www/html/flow3/Packages/Framework/TYPO3.FLOW3/Classes/Package/MetaData/XmlWriter.php on line 31

Fatal error: Class 'XMLWriter' not found
in /var/www/html/flow3/Packages/Framework/TYPO3.FLOW3/Classes/Package/MetaData/XmlWriter.php on line 31


I am stuck
Any advise is very welcome
thks 
mario

(My OS is Fedora14)