I start to use Taverna now, and I don't understand how can I open the interface to QSAR descriptor presented in this website http://cdk-taverna-2.ts-concepts.de/wiki/index.php?title=Full_Descriptions_Of_Available_Activities
                     I am sorry if it is a silly question, but I already try to run workflows with the qsar descriptor in their structure, and they don't work...
                                                                     Thank you!