No data for searchengine etc

Hi everyoone, since three days piwik is not tracking some informations, for example searchengine, keywords, external websites, so the complete details of the whole categorie. All other tracking records are saved. There is no input in the database fields, I’ve cheked everything, but can not find the bug. Today I updated to 0.9, so the problem is under 0.61 and 0´.0 Anyone an idea what is working wrong?