I tried to use resony in csound5-2005-11-09.

Here is output message:
    PortMIDI real time MIDI plugin for Csound
    PortAudio real-time audio module for Csound
    Windows MME real time audio and MIDI module for Csound by Istvan Varga
    0dBFS level = 32768.0
    Csound version 5.00.0 (double samples) Nov  9 2005
    libsndfile-1.0.11
    orchname:  resony.orc
    scorename: resony.sco
    rtaudio: WinMM module enabled
    orch compiler:
    26 lines read
    error:  no legal opcode, line 3:
    * resony.orc */
     instr 1 
    error:  no legal opcode, line 23:
    a1 resony asig, kbf, kbw, inum, ksep, isepmode, iscl
    error:  input arg 'a1' used before defined, line 25:
    out a1
   3 syntax errors in orchestra.  compilation invalid

All  environment variables are installed correct !!!
Eugene Stankevich.


Example from CSound Manual:
;=========================================================
/* resony.orc */
instr 1
  asig vco 32000, 220, 1
  kbf line 60, p3, 600
  kbw = 50
  inum = 2
  ksep = 1
  isepmode = 0
  iscl = 1
  a1 resony asig, kbf, kbw, inum, ksep, isepmode, iscl
  out a1
endin
/* resony.orc */ 
/* resony.sco */
f 1 0 16384 10 1
i 1 0 2
e
/* resony.sco */