Thanks for your replies. My params are just a normal array, and I never had problems with it, so I guess they are in good shape
… the only option I have to add to the params is “fbAppId”, is this correct? Or what is about the ‘fbRootSet’?
@Gustavo: I changed the line as you said, but it just pops up the next error:
CException
Objekt-Konfiguration muss ein Array sein, das ein "class"-Element beinhaltet.
C:\xampp\htdocs\startregie\protected\extensions\faceplugs\EFaceplugsBase.php(247)
235 'qu_PE',
236 'ay_BO',
237 'se_NO',
238 'ps_AF',
239 'tl_ST',
240 );
241
242 public function init()
243 {
244 if (property_exists($this, 'href') && $this->href === null) {
245 $this->href = $this->url;
246 }
247 if (!$this->app_id && isset(Yii::app()->params->fbAppId)) {
248 $this->app_id = Yii::app()->params->fbAppId;
249 }
250 if ($this->url) {
251 $this->registerOpenGraph('url', $this->url);
252 }
253 if ($this->app_id) {
254 $this->registerOpenGraph('app_id', $this->app_id);
255 }
256
257 foreach ($this->og as $type => $value) {
258 $this->registerOpenGraph($type, $value);
259 }
after trying to change this as well it says:
CException
Objekt-Konfiguration muss ein Array sein, das ein "class"-Element beinhaltet.
C:\xampp\htdocs\startregie\protected\extensions\faceplugs\EFaceplugsBase.php(247)
235 'qu_PE',
236 'ay_BO',
237 'se_NO',
238 'ps_AF',
239 'tl_ST',
240 );
241
242 public function init()
243 {
244 if (property_exists($this, 'href') && $this->href === null) {
245 $this->href = $this->url;
246 }
247 if (!$this->app_id && isset(Yii::app()->params['fbAppId'])) {
248 $this->app_id = Yii::app()->params['fbAppId'];
249 }
250 if ($this->url) {
251 $this->registerOpenGraph('url', $this->url);
252 }
253 if ($this->app_id) {
254 $this->registerOpenGraph('app_id', $this->app_id);
255 }
256
257 foreach ($this->og as $type => $value) {
258 $this->registerOpenGraph($type, $value);
259 }
So it always says something like: The object configuration must be an array containing a "class"-element.
Any other ideas? 
here’s some part of my params:
main.php:
'params' => require(dirname(__FILE__) . '/params.php'),
params.php:
// this contains the application parameters that can be maintained via GUI
return array(
// this is displayed in the header section
'title' => 'Test',
// this is used in error pages
'adminEmail' => 'xxx@xx.xx',
// number of posts displayed per page
'postsPerPage' => 10,
// maximum number of comments that can be displayed in recent comments portlet
'recentCommentCount' => 10,
// maximum number of tags that can be displayed in tag cloud portlet
'tagCloudCount' => 20,
// whether post comments need to be approved before published
'commentNeedApproval' => true,
// the copyright information displayed in the footer section
'copyrightInfo' => 'Copyright © 2009 by Yii.',
// Facebook App ID
'fbAppId' => 'xxxxxxxxxxxxxxx',
);
Thanks a lot so far!