Previous and next Month

Hey,

i also have the problem that i cant navigate trough the months. i read the faq and the answer for this problem but in my functions.php the register_sidebar is like you said.
can you please take a look to help me fix the problem? thank you!

http://www.designreh.de/ericf/termine/

bg,
desi

https://wordpress.org/plugins/event-organiser/