Voicemail *97 cant retreive / leave

HI, im using FreePbxInAAflsh v2.4.1.0
i have two identical machines, same distro. on the one machine i can leave a VMessage, not on the other one. On both i cant retrieve the messages, in fact non of the special codes starting with * or # works.
whats the error path or what do i hav to check now?
hint: i tried Grandstream 200 and xlite

thx tom