RF transmitter problem

[areeckal]

I did some code in mplab using hitech compiler for RF transmission.
When i am simulating in mplab i am getting correct output in uart I/O tab. But iam not obtaining any value in the portC ie, TX pin. I tried simulating in proteus by connecting an led to the RC. But nothing is coming. Is there any problem with my code? How to simulate it correctly?
Tx.c

#include <htc.h>
#include "usart.h"

//Chip Settings
__CONFIG(1,0x0200);
__CONFIG(2,0X1E1F);
__CONFIG(3,0X8100);
__CONFIG(4,0X00C1);
__CONFIG(5,0XC00F);

void main()
{
	int addr=0, data=1,checksum;
	//Initialize the USART
	USARTInit();
	char sendData[5];
    sendData[0]='J';
    sendData[1]='S';
	sendData[2]='0';
	sendData[3]='1';
	sendData[4]=sendData[2]+sendData[3];
	//Transmit Data
	while(1)
	{
		USARTWriteByte(sendData[0]);
		//_delay(100);
		//Send synchronization Byte	
		USARTWriteByte(sendData[1]);
		//_delay(100);
		//AddressByte
		USARTWriteByte(sendData[2]);
		//_delay(100);
		//Data byte for start time
		USARTWriteByte(sendData[3]);
		//_delay(100);
		//Checksum
		//checksum=addr+data;		
		USARTWriteByte(sendData[4]);
	//	TXEN=0;
		//_delay(100);
	}
}

usart.c

/*****************************************************************

BAUD RATE:57600 Bits per Second
CRYSTAL Frequency: 20MHz

Target Chip: PIC18F4520
Target Compiler: HI-TECH C For PIC18 (http://www.htsoft.com/)
Project: MPLAP Project File

*****************************************************************/

#include <htc.h>
#include<stdio.h>

#include "usart.h"

void USARTInit()
{
	//Baud Rate = 57600 Bits per Second
	//*** Note: Valid On 20MHz Crystal ONLY ***
	//For other crystal freq calculate new values for SPBRG
	SPBRG=86;

	//TXSTA REG
	TXEN=1;
	BRGH=0;
	SYNC=0;
	//RCSTA
	SPEN=1;
	CREN=1;	//Enable Receiver (RX)
	
	//BAUDCON
	BRG16=1;
	//TRISC
	TRISC=0x00;

}

void USARTWriteByte(char ch)
{
	//Wait for TXREG Buffer to become available
	while(!TXIF);

	//Write data
	TXREG=ch;
}

void USARTWriteString(const char *str)
{
	while((*str)!='\0')
	{
		//Wait for TXREG Buffer to become available
		while(!TXIF);

		//Write data
		TXREG=(*str);

		//Next goto char
		str++;
	}
}

/*

Writes a line of text to USART and goes to new line
The new line is Windows style CR/LF pair.

This will work on Hyper Terminal Only NOT on Linux

*/

void USARTWriteLine(const char *ln)
{
	USARTWriteString(ln);
	USARTWriteString("\r\n");
}

void USARTWriteInt(int val,unsigned char field_length)
{
	if(val<0) 
	{
		USARTWriteByte('-');	//Write '-' sign for negative numbers.
		val=(val*(-1));				//Make it positive.
	}

	//Convert Number To String and pump over Tx Channel.
	char str[5]={0,0,0,0,0};
	int i=4,j=0;
	while(val)
	{
		str[i]=val%10;
		val=val/10;
		i--;
	}
	if(field_length>5)
		while(str[j]==0) j++;
	else
		j=5-field_length;
	
	for(i=j;i<5;i++)
	{
		USARTWriteByte(str[i]);
	}
}


unsigned char USARTReadByte()
{
	while(!RCIF);	//Wait for a byte
	
	return RCREG;
}

Help pls