Connection to derby local db is failing

Hello to all MuleDEV, 

currently working my way toward DEX 401, and hit the wall and (bounced from it... :) ) in Module 4: Walthrough 4-2. 

I'm working from a corp- laptop therefore access to 3306 is not an option. 

Derby db Serice is up and running. 

While I tried many different combinations of versions of regarding the Maven file's artifact dependency, nothing seems to work and cannot connent to training-db. 

Database Configuration are as follows: 

Driver Class Name: org.apache.derby.jdbc.ClientDriver

the DEX 401 guide asks to use version

editing the Maven file for Derby-db driver 

but no such luck. 

Even wtith the

to connect Derby. 

Test connenction error log describes: 

Caused by: java.sql.SQLException: Cannot get connection for URL jdbc:derby://localhost:1527/memory:training :

Does anyone know which version to use, the Walthrough doc seems a little outdated. 

BEst Regards, 

Zoltán