Models:
MXM753N, MXM753U, MXM623N, MXM623U
MXM283N, MXM363N, MXM453N, MXM503N
MXM363U, MXM453U, MXM503U
MXB401, MXB400P, MXB402, MXB402SC

Operating Systems(s):
Windows 7 x64
Windows Server 2008 x64
Windows Vista x64
Windows Server 2003 x64
Windows XP x64

Driver Version(s):
PCL6 1.04.14.01
PS 1.04.14.01
PPD file version 1.0 (MXM753N, MXM753U, MXM623N, MXM623U, MXM283N, MXM363N, MXM453N, MXM503N, MXM363U, MXM453U, MXM503U)
PPD file version 1.3 (MXB401, MXB400P, MXB402, MXB402SC)

Notes:
This download supports two installation methods; setup.exe or Windows Add Printer wizard
Corrects jam when using Citrix Universal Printer 
corrects printer driver loosing its Configuartion on 2003 server
Microsoft WHQL Certified