SOMETIMES PRINTER CANT ACCESS FROM NETWORK

Hello,


I have a shared printer hp laserjet 2010 in my xp machine(root)-RAM 1 GB.others machine in network can access this printer and print their jobs.But sometimes what happened is ,they cannot access this printer and also this machine,when they want to access from workgroup it shows "YOU MIGHT NOT HAVE PERMISSION".But after restating of root machine every one can acces that printer easily.Please solve as early as possible.