Excel importer not showing object types to map to

I'm using 2.5.1rc-2 and the latest excel importer and reflection module. When I create a template I cannot choose a Mendix Object to map to, the list stays empty and searching doesn't help. Any ideas?
1 answers

let me expand on MichelĀ“s comment:

if you check the documentation on the Reflections module you will notice that there is a note on either using a SYNCHRONIZE option, or to add the synchronisation microflow on start-up

Fixed the problem for me