Fails invoking a simple php file and html file from arduino yun

Hello Friends

I am using the httpclient example from arduino yun for executing a php file that i have on a hosting and it should returns me the datetime. However i get the following error from the arduino monitor:

406 Not Acceptable

Not Acceptable

An appropriate representation of the requested resource /WebTekDomo/Clases/clsOpFecha.php could not be found on this server.

Additionally, a 406 Not Acceptable error was encountered while trying to use an ErrorDocument to handle the request.

i get the same result from a simple html file where i put hola

Please tell me what i need to do for this could working fine

PD: Actually when i invoke this php from my pc it returns the date.

PD2: the code that i am using is the following:

#include <Bridge.h>
#include <HttpClient.h>

void setup() {
// Bridge takes about two seconds to start up
// it can be helpful to use the on-board LED
// as an indicator for when it has initialized
pinMode(13, OUTPUT);
digitalWrite(13, LOW);
Bridge.begin();
digitalWrite(13, HIGH);

SerialUSB.begin(9600);

while (!SerialUSB); // wait for a serial connection
}

void loop() {
// Initialize the client library
HttpClient client;

// Make a HTTP request:
client.get(“http://www.mydomain.com.ec/Clases/clsOpFecha.php”);

// if there are incoming bytes available
// from the server, read them and print them:
while (client.available()) {
char c = client.read();
SerialUSB.print(c);
}
SerialUSB.flush();

delay(5000);
}

Please help me

Kind regards