For 64 bit OS and USB connected devices you must use SAPLPD version 6.2x.
SAPLPD version 6.2x is required for most PC connected printers being used for AMS and ROSI printing.
Saplpd 6.2x is installed as part of the new Admin Systems software, but there is no easily accessible shortcut for it.
There is a SAPLPD 4.08 shortcut in the Admin Systems Start Menu Program group that can easily be modified to point at SAPLPD 6.2x
Looking at the shorcut properties for SAPLPD 4.08 the Target is:
Windows 32 bit:
"C:\Program Files\SAPPc\Saplpd 4.08\Saplpd.exe"
Windows 64 bit:
"C:\Program Files (x86)\SAPPc\Saplpd 4.08\Saplpd.exe"
Simply change that Target location to point at:
Windows 32 bit:
"C:\Program Files\SAP\FrontEnd\SAPgui\SAPlpd\saplpd.exe"
Widnows 64 bit:
"C:\Program Files (x86)\SAP\FrontEnd\SAPgui\SAPlpd\saplpd.exe"
It is best if SAPLPD is set to run automatically at startup by adding the modified shortcut to the Startup program goup.