Do you have any multipliers that work?
I have Imported mine, here is the model imported:
 AD633J Analog Multiplier Macro Model
 Description: Amplifier
 Generic Desc: Bipolar, Multiplier, 4 Quadrant
 Developed by: AAG/PMI
 Revision History: 08/10/2012  Updated to new header style
 1.0 (12/1993)
 Copyright 1993, 2012 by Analog Devices
 Refer to http://www.analog.com/Analog_Root/static/techSupport/designTools/spiceModels/license/spice_general.html for License Statement. Use of this model
 indicates your acceptance of the terms and provisions in the License Statement.
 BEGIN Notes:
 Not Modeled:
 Parameters modeled include:
 This version of the AD633 analog multiplier model simulates the worst case
 parameters of the ‘J’ grade. The worst case parameters used correspond
 to those parameters in the data sheet.
 END Notes
 Node assignments

X1

 X2

  Y1

   Y2

    VNEG

     Z

      W

       VPOS

       
.SUBCKT AD633J 1 2 3 4 5 6 7 8
*
EREF 100 0 POLY(2) 8 0 5 0 (0,0.5,0.5)
*
 XINPUT STAGE & POLE AT 15 MHz
IBX1 1 0 DC 2E6
IBX2 2 0 DC 2E6
EOSX 10 1 POLY(1) (16,100) (30E3,1)
RX1A 10 11 5E6
RX1B 11 2 5E6
*
GX 100 12 10 2 1E6
RX 12 100 1E6
CX 12 100 1.061E14
VX1 8 13 DC 3.05
DX1 12 13 DX
VX2 14 5 DC 3.05
DX2 14 12 DX
*
 COMMONMODE GAIN NETWORK WITH ZERO AT 560 Hz
ECMX 15 100 11 100 10
RCMX1 15 16 1E6
CCMX 15 16 2.8421E10
RCMX2 16 100 1
*
 YINPUT STAGE & POLE AT 15 MHz
IBY1 3 0 DC 2E6
IBY2 4 0 DC 2E6
EOSY 20 3 POLY(1) (26,100) (30E3,1)
RY1A 20 21 5E6
RY1B 21 4 5E6
*
GY 100 22 20 4 1E6
RY 22 100 1E6
CY 22 100 1.061E14
VY1 8 23 DC 3.05
DY1 22 23 DX
VY2 24 5 DC 3.05
DY2 24 22 DX
*
 COMMONMODE GAIN NETWORK WITH ZERO AT 560 Hz
ECMY 25 100 21 100 10
RCMY1 25 26 1E6
CCMY 25 26 2.8421E10
RCMY2 26 100 1
*
 ZINPUT STAGE & POLE AT 15 MHz
IBZ1 7 0 DC 8E7
IBZ2 6 0 DC 8E7
RZ1 7 6 10E6
*
GZ 100 32 7 6 1E6
RZ2 32 100 1E6
CZ 32 100 1.061E14
VZ1 8 33 DC 3.05
DZ1 32 33 DX
VZ2 34 5 DC 3.05
DZ2 34 33 DX
*
 50MHz MULTIPLIER CORE & SUMMER
GXY 100 40 POLY(2) (12,100) (22,100) (0,0,0,0,0.1E6)
RXY 40 100 1E6
CXY 40 100 3.1831E15
*
VOOS 59 40 DC 50E3
Q1 55 32 60 QX
Q2 56 59 61 QX
R1 8 55 3.1831E4
R2 60 54 3.1313E4
R3 8 56 3.1831E4
R4 61 54 3.1313E4
I1 54 5 1E4
*
 GAIN STAGE & DOMINANT POLE AT 316.23 Hz
G1 100 62 55 56 3.141637E5
R5 62 100 1.0066E8
C3 62 100 5E12
V1 8 63 DC 4.3399
D1 62 63 DX
V2 64 5 DC 4.3399
D2 64 62 DX
*
ENZ 65 100 62 100 1E6
RNZ1 65 66 1
FNZ 65 66 VNC 1
RNZ2 66 100 1E6
ENC 67 0 65 66 1
CNZ 67 68 7.9577E9
VNC 68 0 DC 0
*
G2 100 69 66 100 1E6
R6 69 100 1E6
C2 69 100 3.9789E14
*
FSY 8 5 POLY(2) VZC1 VZC2 (4.8286E3,1,1)
RDC 8 5 28E3
GZC 100 73 72 69 11.623E3
VZC1 74 100 DC 0
DZC1 73 74 DX
VZC2 100 75 DC 0
DZC2 75 73 DX
VSC1 70 72 1.125
DSC1 69 70 DX
VSC2 72 71 1.125
DSC2 71 69 DX
GO1 72 8 8 69 11.623E3
RO1 8 72 86
GO2 5 72 69 5 11.623E3
RO2 72 5 86
LO 72 7 1E7
*
.MODEL QX NPN(BF=1E4)
.MODEL DX D(IS=1E15)
.ENDS AD633J
idk if the problem is there but I have stuck there for quite a long time now.