SharePoint SiteDefinitions

I have created a simple site definition based on the publishing portal. Every time I want to use the template to create a site-collection I get the following error-message:

The template you have chosen is invalid or cannot be found.

I do not use any custom feature, just the default features with the publishing portal site-def. Any hints?

There is a error log but it just gives me the information above:

Applying template "PalfingerPlatformsOrderRoot#0" to web at URL "http://datsa0004:8080/Platforms/Orders/0000112233".     
Failed to get the site template for language 1031, search key 'PalfingerPlatformsOrderRoot'. This warning is expected when provisioning from a custom web template.  
Failed to apply template "PalfingerPlatformsOrderRoot#0" to web at URL "http://datsa0004:8080/Platforms/Orders/0000112233".  
Failed to apply template "PalfingerPlatformsOrderRoot#0" to web at URL "http://datsa0004:8080/Platforms/Orders/0000112233", error The template you have chosen is invalid or cannot be found. 0x81071e44     
The template you have chosen is invalid or cannot be found.  
CreatePortal failed creating portal webs. Microsoft.SharePoint.SPException: The template you have chosen is invalid or cannot be found. ---> System.Runtime.InteropServices.COMException (0x81071E44): The template you have chosen is invalid or cannot be found.     at Microsoft.SharePoint.Library.SPRequestInternalClass.ApplyWebTemplate(String bstrUrl, String& bstrWebTemplate, Int32& plWebTemplateId)     at Microsoft.SharePoint.Library.SPRequest.ApplyWebTemplate(String bstrUrl, String& bstrWebTemplate, Int32& plWebTemplateId)     --- End of inner exception stack trace ---     at Microsoft.SharePoint.Library.SPRequest.ApplyWebTemplate(String bstrUrl, String& bstrWebTemplate, Int32& plWebTemplateId)     at Microsoft.SharePoint.SPWeb.ApplyWebTemplate(String strWebTemplate)     at Microsoft.ShareP...  
...oint.Publishing.PortalProvisioningProvider.CreatePortal(String xmlFile, SPWeb rootWeb)