lp: job could not be printed

["Donato <natas> Pasqualicchio" <natas@xxxxxxxxxxxxxx>]

hi all,
i've installed apsfilter and well configured my printer in it. the test 
tool has printed, but when i try to print somethings i had this error on 
paper:

Error: /typecheck in --closefile--
Operand stack:
--nostringval-- ()
Execution stack:
&interp_exit .runexec2 --nostringval-- --nostringval-- --nostringval--
2 %stoppd_push --nostringval-- --nostringval-- --nostringval-- false
1 %stopped_push 1 3 %oparray_pop --nostringval-- --nostringval-- false

Dictionary stack:
--dict:1052/1476(to(G)
Current allocation mode is local

on log i've "lp: job could not be printed"

some hint?
-- 
Donato "natas" Pasqualicchio
undergraduate student of internet sciences - Bologna, Italy
developer for www.i-sciences.net - natas@i-sciences.net