Once I’ve encounter problem on user having M$ Windows XP Professional SP2 with Firewall enabled that printing to SAPLPD is not possible. I remember, since SAPLPD request is from the SAP Server, TCP port needs to be opened on the firewall. I have researched on SAP’s documentation (TCP/IP Ports Used by SAP Applications) that SAPLPD uses TCP Port 515. I have added new TCP Port excemption for this and tried printing.