Tnx Rob for taking the time to help.
Your correct, it is a choise colum. I've got 3 choices, and one of those is "11 uur". I've been able tot make it work with "contains" as an option. But with "is equal to" it fails.
Within the dynamic content browser I've got the following options

I've pick the first "Answers to the question above". I should be able to fill in the "is equel to" value instead of "contains" to succesfull do this flow?
Tnx again Berend.