problem with IAR code

I don't like opening RAR files but my experience with IAR is rusty..

Normally you need to fill in the putch() funtion to divert traffic to the correct peripheral.. What system are you using as when I used IAR, it was for Hitachi H8 systems

Try putting the A in single quotes?

UART1_SendData8('A');

Single quotes denote a char value, double would normally be a pointer to a character array string.