The RPC server is unavailable when printing. Printer is installed on network system.

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C#

hi
I am trying to print a report (.rdlc) from button click as below. It throws a message as same as from a report viewer control.

private void btnPrint_Click(object sender, EventArgs e)
{
   Report1.PrintOptions.PrinterName = cmbPrinters.Text;

   Report1.PrintOptions.PaperSize = (CrystalDecisions.Shared.PaperSize)GetPaperSize(cmbPrinters.Text, "A4");
   //PaperSize.PaperA4 - It goes PaperA4 

   Report1.PrintOptions.PaperOrientation = PaperOrientation.Landscape;

   Report1.PrintToPrinter(1, false, 1, 1);

   MessageBox.Show("Print Done");

}

when it comes to the line :

Report1.PrintToPrinter(1, false, 1, 1);

it throws exception saying "The RPC server is unavailable". The printer is working fine. Its a network printer and I have given proper path for it.
The point to be noted is, when for the first time I tried to print it threw exception saying "The RPC server is unavailable" there after. Please help.

Thanks

code block corrected