Newbie question regarding printer

[eldarinn]

Hello everyone
I am sorry if the question is very basic but I do not have too much idea about all the programing part of these printers;
I successfully built a kit of Geeetech Prusa I3 M201 3D Printer and the printer is functional.
I was able to test the movement of the motors etc.

At the same time, I am having difficulties connecting the printer through the USB to the Repetier-Host server.
I am having the same issue when the server is on or off.

When I am trying to connect the printer by pressing CONNECT on the top left, I receive this message in the log:

16:57:01.210 : Serial com error:System.IO.Ports.SerialErrorReceivedEventArgs
16:57:01.220 : Serial com error:System.IO.Ports.SerialErrorReceivedEventArgs
16:57:01.226 : Serial com error:System.IO.Ports.SerialErrorReceivedEventArgs
16:57:01.227 : Serial com error:System.IO.Ports.SerialErrorReceivedEventArgs
16:57:01.230 : Serial com error:System.IO.Ports.SerialErrorReceivedEventArgs
16:57:01.291 : Serial com error:System.IO.Ports.SerialErrorReceivedEventArgs
16:57:01.304 : Serial com error:System.IO.Ports.SerialErrorReceivedEventArgs
16:57:01.415 : Serial com error:System.IO.Ports.SerialErrorReceivedEventArgs
16:57:01.427 : Serial com error:System.IO.Ports.SerialErrorReceivedEventArgs
16:57:01.448 : Serial com error:System.IO.Ports.SerialErrorReceivedEventArgs
16:57:02.702 : No start signal detected - forcing start

I am able to slice a sample but the PRINT button is disabled;
What is missing? Thanks in advance!

[bang]

Hi,
I suppose you may have a wrong Baud Rate(the right one is 115200) in "Printer Settings",the "print" button won't enable unless you connect the printer to your computer successfully:

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