[SLE] Printing under Root ?

Hi all, I've been 'listening' this mailing for several days and i have learn a lot of thing. Very good and active list :-)) I ve a little strange probleme, i've configured ApsFilter for my HP840C it works fine when i logged in with a 'normal' user. I can print from console : lpr somefile or from Xfree, Opera,Tkrat,Nedit,SOffice But if i loggin under root, i cannot print anything , on console : lpr somefile does nothing i try to look logs to see what's wrong, there an error message : lp: can't exec ..... (i don't have here the exact error). I also try to install ApsFilter from source, and the same probleme occurs. it very strange, does someone have any idea ? Thank's for help Auguste Service Technique Neyrial Télécoms