TOPIC: List are synchronized / users not

Hi,

Their is a strange problem with my installation :

From the dashboard :
click on list
click on synchonize
all the list from mailchimp are listed below
able to put checkboxed on and of , just choose 1 list
click synchornize button on the right , nothing will happend
the checkboxed are check and with mouse over it would be change in a stop sign
close button on the right is still working.

Pls advise

Many thanks in advanced
Best regards,
Marco