Community Builder - Empty Userlist

Hey,

- I installed CB V1.8.1
- I have the default 'mermbers list' an some other lists in listmanager.
- I have no filter in the lists
- I have columns in the listing
- I see Users in the Userslist

Now my Problem:
When I open the userlist in the frontend, it's empty. I can click an 'empty' user and see the information on the new page, but the line is empty :

<tr class="sectiontableentry1" style="cursor:hand;cursor:pointer;" id="cbU0">
<td valign="top" class="cbUserListCol1">

</td>
<td valign="top" class="cbUserListCol2">

</td>
<td valign="top" class="cbUserListCol3">

</td>
<td valign="top" class="cbUserListCol4">

</td>
</tr>

Can somebody pls help me?