Big problem with printing - desperately needing help

Hi,

I've got a wireless network with 4 computers. They all run an app written
in VB that reads data on a DB on computer 1 and print on a printer installed
on computer 1 too.

After removing old users and creating new ones my app don't print anymore.
It reads and writes on DB, but I can't print. One machine still prints
remotely, and two others don't.

Just to be sure, I tried to print from notepad and it worked fine.

Although I use a shortcut on all machines pointing to the app on computer 1
(easier to make upgrades), I have the app installed on all four, so I can
run it locally too. Running the app through the network or locally makes no
difference.

I removed the printer and reinstalled it, and it makes no difference.

Please, any help would be greatly appreciated.


Thanks,

Luiz Horacio