tiva c launchpad TM4C123G, issue to load the program using debug

hi everybody,

i was practicing with the UART1 in my TIVAC TM4C123G , so when i load my program in keil, the board have  been proggramed without error's, and i saw the result in a terminal serial, good, but when i .

wanted to load other program in my tivac , keil show me this errors, warnings...

so i can't load programs in my tiva... this is actually setup.

when i was setup UART1 and called function's accidently i made mistakes such as:

void initUART( void ) {
............................. SYSCTL->RCGC1 = 0x02;                                 // uart 1                 
..............................SYSCTL->RCGC2|=0x04;                                // port c
..............................GPIOC->AFSEL=0x30;                                     // alter function  UART1  PC5 PC4
..............................GPIOC->PCTL=0x220000;                            // mux function 2 en 5 2 en 4
..............................GPIOC->DEN=0x30; // pin 5 pin4 3 2 1 0
                                                                                                                     // config de la uart
..............................UART1->CTL&=~0x01; // uart 0ff
                                                                                                                    // bauds
..............................UART1->IBRD=104;                       // 9600 baudios 80M 520 16M 104 +0.166666
..............................UART1->FBRD=10;                       // 9600 baudios 80M 53 16M 10

..............................UART1->LCRH=0x70; // 8 bits normal
..............................UART1->CTL|=0x01; // uart on
}

int main(void){
............................config();
............................initUART();
............................sprintf(&Buffer[0],"Hello world");
.............................while( 1 ){
...............................................GPIOF->DATA= 0x08;
...............................................writePort(&Buffer[0]);
...............................................delay();
...............................................GPIOF->DATA= 0x00;
...............................................delay();
.............................................}// end while loop
}// end main

void writePort(char *Buffer){
.........................while( *Buffer != NULL ){
.....................................putC(*Buffer);
......................................Buffer++;
..........................}
}

void putC(char c){

....................while( (UART1->FR & 0x20 ) == 1);

....................UART1->DR=c;
}

in this lastly condition in the while loop must be ****  while( (UART1->FR & 0x20 ) != 0 );  *****

i think that  i modified the JTAG debug... ( PORTC )

i have thought in proggraming use LM FLASH programmer but i haven't experience.....

so can someone helpme please ?? thanks