HP Laserjet 4200 shared from 2008R2 x64 - 32bit XP & 7 can add fine, but 32bit vista can't

Question

I have an HP 4200 installed on my 2008R2 server using x64 PCL6 drivers. I've added the 32bit drivers from here which have allowed my Win 7 & XP 32bit clients to add this printer without any issues at all. On Vista however, I get the following message "The server for the 'HP LaserJet 4200 PCL 6' printer does not have the correct printer driver installed." Any idea why only vista would be affected by this and what I could do to resolve it?

Below are my shared driver settings for this printer as well as the output of my driver list in print management.

shared driver settings

Driver Name Environment Driver Version  Driver Isolation    Provider    Server Name Print Processor Packaged    Driver Date Inf Path    Driver File Path
Generic / Text Only Windows x64 6.1.7600.16385  None    Microsoft   print (local)   winprint    TRUE    6/21/2006   C:\Windows\System32\DriverStore\FileRepository\prnge001.inf_amd64_neutral_cfffa4143b3c4592\prnge001.inf C:\Windows\system32\spool\DRIVERS\x64\3\UNIDRV.DLL
HP LaserJet 4200 PCL 6  Windows x64 61.74.561.43    None    HP  print (local)   hpcPP5r1    TRUE    3/18/2008   C:\Windows\System32\DriverStore\FileRepository\hpc4200u.inf_amd64_neutral_be93ca3adaf915f5\hpc4200u.inf C:\Windows\system32\spool\DRIVERS\x64\3\unidrv.dll
HP LaserJet 4200 PCL 6  Windows NT x86  61.74.561.43    None    HP  print (local)   hpcPP5r1    TRUE    3/18/2008   C:\Windows\System32\DriverStore\FileRepository\hpc4200c.inf_x86_neutral_7f1368c67e0ce1ee\hpc4200c.inf   C:\Windows\system32\spool\DRIVERS\W32X86\3\unidrv.dll
HP Universal Printing PCL 6 Windows x64 61.112.1.9321   None    HP  print (local)   hpcpp112    TRUE    2/9/2011    C:\Windows\System32\DriverStore\FileRepository\hpcu112u.inf_amd64_neutral_a0e7e0134384cbcb\hpcu112u.inf C:\Windows\system32\spool\DRIVERS\x64\3\unidrv.dll
HP Universal Printing PCL 6 Windows NT x86  61.115.1.10527  None    HP  print (local)   HPCPP115    TRUE    6/6/2011    C:\Windows\System32\DriverStore\FileRepository\hpcu115c.inf_x86_neutral_89c704d2fef0ef48\hpcu115c.inf   C:\Windows\system32\spool\DRIVERS\W32X86\3\unidrv.dll
Microsoft Shared Fax Driver Windows x64 6.1.7601.17514  None    Microsoft   print (local)   winprint    TRUE    6/21/2006   C:\Windows\System32\DriverStore\FileRepository\prnms002.inf_amd64_neutral_d834e48846616289\prnms002.inf C:\Windows\system32\spool\DRIVERS\x64\3\FXSDRV.DLL
Microsoft XPS Document Writer   Windows x64 6.1.7601.17514  None    Microsoft   print (local)   winprint    TRUE    6/21/2006   C:\Windows\System32\DriverStore\FileRepository\prnms001.inf_amd64_neutral_9fe8503f82ce60fa\prnms001.inf C:\Windows\system32\spool\DRIVERS\x64\3\mxdwdrv.dll
Remote Desktop Easy Print   Windows x64 6.1.7601.17514  None    Microsoft Remote Desktop Services   print (local)   winprint    TRUE    6/21/2006   C:\Windows\System32\DriverStore\FileRepository\tsprint.inf_amd64_neutral_c48d421ad2c1e3e3\tsprint.inf   C:\Windows\system32\spool\DRIVERS\x64\3\mxdwdrv.dll