COM port conflict

I have reinstalled WIN XP in my computer and the port COM 1 is not
communicating with a plotter machine that I have attached to it. It was
working before
When I go to DEVICE MANAGER / PORTS appear COM 1 enable, I have called the
company for the plotter machine and after they review my computer in DOS
mode the have told me that the port COM 1 is not working or doesn't appear
in there.
I also have check in DEVICE MANAGER that the port COM 2 has a symbol like
this ( ! ) .
Please somebody can help me to fix this problem or help me to reinstall the
port,
Thank,
Carlos


Yo he reinstalado Win XP in my computer y ahora el puerto COM 1 no esta
funcionando, cuando voy a device manager aparece como enable pero no hay
comunicacion ninguna con un ploter machine que tengo instalado a ese puerto.
Tambien en device manager aparece el puerto COM 2 con un simbolo como este
( ! )
He llamado a la compania del ploter machine y despues de revisar mi
computadora en DOS me ha dicho que el puerto no esta funcionando o no
aparece.
For favor necesito saber como puedo arreglar este problema.
Gracias,
Carlos