Printing to HP printer - Working from one PC and not working from others

Setup : Windows xp sp3. New HP Printer 1020.
Printer drivers installed properly & after first test page no further printing came. Whenever we give a print job just RED LED blinks few times on printer and no further progress.
Same printer checked in almost all PCs in network but same problem.
Then connected to an external laptop and worked ok.
The problem was with samsung printer driver.
Solution : Install samsung PCL6 driver only. (PS/2 driver was causing problem).

VPN error - VPN cant connect. never asked for ID and password.

Problem - Cisco VPN doesnt ask for login ID and password.

Observations - TCP/IP is working fine. Able to ping the IP address of the machine we wanted to connect to.

Solution - The Cisco VPN client connects through the TCP and UDP Protocol. Earlier it was only TCP. Changed it to use the UDP/TCP Protocol. Working fine.