I can't print after upgrade

[guest1]

I've upgraded my PC (runing Debian 2.0) from VXPro/Pentium 133 to
TXPro-II/K6II 266 and almost everything worked fine except my printer. 
Everything looks to be correct: irq ; printcap ; cat /proc/devices: lp is
included ; cat /proc/ioports: 0378-037f cat /proc/interrupts: lp is not
included but tunelp dev/lp0: /dev/lp0 using IRQ 7. However I've sent my
jobs to printer, they are listed in the lpq but after some time they just
disappear and nothing is printed. Could somebody give a hint? 
Thanks in advance.