NeoSWSerial cannot read from multiple instances

[KeerthiNadella]

i'm using two neoswserials.
NeoSWSerial mySerial1( 5, 4);
NeoSWSerial mySerial2( 6, 8);

void loop(){

//mySerial2.ignore();
//mySerial1.listen();
if (mySerial1.available()) {

char data = mySerial1.read(); // Read the incoming byte
// Process the received data from port 1
Serial.print("Data from port 1: ");
flagserial = 1;

processReceivedChar(data);
updateCurrent();

}

//mySerial1.ignore();
//mySerial2.listen();
if (mySerial2.available()) {

char data = mySerial2.read();// Read the incoming byte
// Process the received data from port 2
Serial.print("Data from port 2: ");
flagserial = 2;

processReceivedChar(data);
updateCurrent();
}

}

the above code is my loop function. but the values are read only from one serial

can anyone help with this