Big problem with 2003 terminalserver local printers

Hi a have a big problem with terminal server on windows
2003 when a client connect with local printer adobe pdf
writer and fax program printer or printer with no drivers
the windows 2003 server will all users be disconnected
but reconnected in three minutes and disconnected 15
minutes later until the client log of from terminal
server.

Printers drivers can a install easy but Zetafax hp fax
Adobe pdf writer are not so easy to install an cost
server licenses