pic16f877 + rs232 + matlab

[a_sniper]

hi every one
i am trying to write program to make communication between matlab and pic16f877

but when i tried to send string value from matlab to pic using "fprintf" in matlab and "gets" in ccs compiler it didn't work
although when i tried to send character from matlab to pic using "fprintf" in matlab and "getc" in ccs compiler it was ok
so can any one help me

and when i used virtual terminal for rs232 in Proteus instead of matlab it was ok

notice
i used in simulation Proteus 7 Professional

#include <16f877.h>
#device adc=10
#use delay(clock=20M)
#byte port_a=5               // port_a address 5
#byte port_b=6               // port_b address 6
#byte port_c=7               // port_c address 7
#byte port_d=8               // port_d address 8
#byte port_e=9               // port_e address 9
#fuses HS
#use rs232(baud=9600,xmit=pin_c6,rcv=pin_c7,BITS =8,PARITY=n,STOP=1,ERRORS)

#include <stdlib.h>
#include <string.h> 
char c;
float data;
float  volt;

int pwm1=0;
char vstr[10]; 

void io_set()
{
   set_tris_a(0xff);
   set_tris_b(0x00);
   set_tris_e(0xff);
   output_b(0x00);
}


////////////////////////////////////////////////////////////////////////////////
////////////////////////////// control /////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
void read_analog()
{
   while(true)
      {
         if(kbhit()) 
         {
            gets(vstr);
            pwm1=atoi(vstr);
            output_b(pwm1);
            break; 
         }
      }
}

void main()
{
   setup_adc_ports(A_ANALOG);      // PA all a/d ports and Vdd ref+  Vss ref-
   setup_adc(ADC_CLOCK_DIV_32); 
   
   io_set();
   while(true)
   {
      read_analog();
   }
}

and matlab code

s=serial('COM1');
set(s,'BaudRate',9600);
set(s,'DataBits',8);
set(s,'Parity','none');
set(s,'StopBits',1);
set(s,'FlowControl','none');
fopen(s);

x=input('enter number \n');
ch=num2str(x);
fprintf(s,'%s',ch);

fclose(s)
delete(s)
clear s