406353 joomla problem joomfish / sef4

Hello, On my website [login to view URL] i have 2 languages - dutch - english I use the components: Joomfish and sh404sef When i visit my website the default language is english in config dutch is selected. Task 1: When visiting the website dutch language must be default When i select dutch language it goes to: [login to view URL] When i select before sh404sef installed english it goes to: [login to view URL] This is not working anymore task 2: Make [login to view URL] working On all articles I see: No translation available. Task 3: is there a way to fix this? just 3 small tasks Task 1: When visiting the website dutch language must be default task 2: Make [login to view URL] working Task 3: is there a way to fix this?