Serial Commuinications

I'm trying to figure out how to communicate with a California Instruments Model 801PR Power Generator using the Com1: port. I've tried example serial programs in Labview and get the following error:
Error -1073807346 occurred at VISA Open in Serial Communication.vi.
Possible reasons:
VISA: (Hex 0xBFFF000E) The given session or object reference is invalid.
When I try running an "initialization VI" that was provided with the 801PR (in the CICRP50 vi lib) I get the following message:
Error -1074135040 occurred at CIC_RP50 Initialize.vi.
Possible reasons:
IVI: (Hex 0xBFFA0000) Cannot load IVI engine.
Does anyone know what this means and is anyone able to offer advice on how to communicate via the serial port. I'm using Labview 6.1 and this is my first project.

Hi cmm,
Before you can use the serial-port in LabVIEW, MAX has to "see" it. Normally, in MAX, it appears per pic. (attached)
If you don't see the "COM" port in MAX, try VIEW\Refresh - (MAX will look for "new" devices.)
If it _still_ doesn't show-up, you may have some hardware conflict. Can you use the port under Windows' Hyperterminal? (use a loop-back connector to confirm operation.)
Cheers
When they give imbeciles handicap-parking, I won't have so far to walk!
Attachments:
MAX.JPG ‏24 KB

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Olá, achei bem interessante este projeto, porém tenho algumas perguntas:
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Quando você diz: "Reconhecer comandos de voz como "POSIÇÃO 1, POSIÇÃO 2", você está se referindo que o conteúdo da mensagem falada é "POSIÇÃO 1,POSIÇÃO 2" ou que isso é uma mera identificação para uma mensagem diferente?
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"In theory, theory and practice are the same. In practice, they’re not."

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Serial Commuinications