Zend certified PHP/Magento developer

Class Interceptor error

I have developed a module that use MagentoCatalogSearchModelResourceModelFulltextCollection
but when I call the method i get this error:

Error occurred when creating object: OctOctHelperSearchMagento, Argument 10 passed to 
OctOctHelperSearchMagento::__construct() must be an instance of 
MagentoCatalogSearchModelResourceModelFulltextCollection, instance of 
WeltPixelLayeredNavigationModelResourceModelFulltextCollectionInterceptor given.

is it an override? can you skip this to use the original class?

Thnk!