I have Ubuntu 9.04, and a HP laserjet 1018 printer.

I install the printer using:
"sudo hp-setup"
and when it ask me about plugin I give the path to it. (the 3.9.2 version of the plugin, because Ubuntu 9.04 has the 3.9.2 version of hplip)

well I install the printer, everything works perfectly. .... but, when I turn off the PC, and turn it on again, the printer does NOT work!!!!!, I send work for being printed but mothing happens , Ubuntu tells me that the job was printed but ... no case, my printer does not print it.

I have to install it again since cero

what can I don to stop install it every time I turn off the computer ?

Have you tried installing it directly with the cups web interface? Just open a browser and enter "localhost:631".

When you tell it to install a new printer, you may see two choices---one a USB printer, and the other with hplip. At least one should work.

And check to make sure CUPS is enabled to start at system boot time.