Problem with Comm control (trying to make Caller ID app)

[baja_yu]

Hi everyone. Long time no see.
I need a little help with the Comm control. I found this topic with code for detecting Caller ID.

http://www.vbforums.com/showthread.php?t=103953

The problem is, when ever I try to run the code it errors on this line:

MSComm1.PortOpen = True

saying: Runtime error 8012. The Device is not open.

I have no idea how to solve this. Other options are all set correctly (Com port, etc)