moxi binary get/set fails

#!/usr/bin/env python

import mc_bin_client

mc = mc_bin_client.MemcachedClient("127.0.0.1", 11211)
mc.set("someKey", 0, 0, "abcd")
lc = mc.get("someKey")
print("someKey = "+lc[2]);

File "./binaryset.py", line 7, in ?
lc = mc.get("someKey")
File "/opt/NorthScale/1.6.0beta2rc1/bin/ep_engine/management/mc_bin_client.py", line 134, in get
parts=self._doCmd(memcacheConstants.CMD_GET, key, '')
File "/opt/NorthScale/1.6.0beta2rc1/bin/ep_engine/management/mc_bin_client.py", line 87, in _doCmd
return self._handleSingleResponse(opaque)
File "/opt/NorthScale/1.6.0beta2rc1/bin/ep_engine/management/mc_bin_client.py", line 80, in _handleSingleResponse
cmd, opaque, cas, keylen, extralen, data = self._handleKeyedResponse(myopaque)
File "/opt/NorthScale/1.6.0beta2rc1/bin/ep_engine/management/mc_bin_client.py", line 76, in _handleKeyedResponse
raise MemcachedError(errcode, rv)
mc_bin_client.MemcachedError: Memcached error #1: Not found

ascii telnet get through 11211 fails, too.