Does the printer say it is ready? Do you show anything in the firewall log or D+ log? What OS and version of Comodo are you using? What are your D+ settings for Print Spooler? Haven't seen problems with non-networked, unshared printers before.
Prior to installing I set both the firewall and D+ to training mode. I have added spoolsv.exe to the allowed process list. The printer does say it is ready (and is recognized when turned on). Nothing appears in either log.
Windows XP SP2
Comodo Firewall Pro v3
-Edit: I ran Samsung's Dr. Printer which reinstalled the drivers, works now. Hopefully it'll work when I restart though.. I'll keep you posted