You probably have a 532/16 -- there is no /12 designation in this model (or possibly any Zeiss Ikon camera ???).
One thing to try:
1) Remove the film.
2) Using your thumb, press and turn the frame counter dial in a clockwise position until it clicks/locks at "1." You might be able to move the film advance knob a bit.
3) Tension the shutter and see if you can release it with the body release.
4) If you can, then use your thumb to push and advance the frame counter to "2." Tension and release the shutter.
5) Do this for all 11 frames.
Now, load your film normally until "1" appears in the red window. Once "1" is in the red window, slide the cover until it's closed. Press and turn the frame counter until it clicks/locks at "1."
If none of this works, it's likely that the camera will need to be serviced. It could be anything from a blocked release to a problem with the shutter or the small release lever or something else.