Why I can not send mail?

Please help me ?

[QUOTE]

[B]PHP Code :[/B]

//Check whether the submission is made
if(isset($hidSubmit)){

//Declarate the necessary variables
$mail_to=”[email protected]“;
$mail_from=$txtEmailfrm;
$mail_sub=$txtSub;
$mail_mesg=$txtMsg;

//Check for success/failure of delivery
if(mail($mail_to,$mail_sub,$mail_mesg,”From:$mail_from/r/nReply-to:$mail_from”)){
$msgemail = “<span class=’msgmail_success’>E-mail has been sent Successfully.</span>”;
} else {
$msgemail = “<span class=’msgmail_fail’>Failed to send the E-mail.</span>”;
}
}

[/QUOTE]

[QUOTE]

[B]Form :[/B]

<form name=”frmsendmail” method=”post” action=””>
<table width=”100%” border=”0″>
<tr>
<td height=”35″ colspan=”2″ align=”center” class=”table_font”><? echo $msgemail; ?></td>
<tr>
<td width=”33%” align=”right” class=”table_font”><b>From :
</b></td>
<td width=”67%”><input name=”txtEmailfrm” type=”text” class=”input” id=”txtEmailfrm” size=”30″ maxlength=”100″> </td>
<tr>
<td align=”right” class=”table_font”><b>Subject :
</b></td>
<td><input name=”txtSub” type=”text” class=”input” id=”txtSub” size=”30″ maxlength=”100″> </td>
<tr>
<td align=”right” class=”table_font”><b>Mesage :
</b></td>
<td><textarea name=”txtMsg” cols=”40″ rows=”10″ class=”input” id=”textarea”></textarea></td>
<tr>
<td colspan=”2″ align=”center”><input name=”hidSubmit” type=”hidden” id=”hidSubmit” value=”true”>
<input name=”Submit” type=”submit” class=”input” value=”Send”>
&nbsp;&nbsp;&nbsp;&nbsp;

<input name=”Submit2″ type=”reset” class=”input” value=”Reset”> </td>
</tr>

</table>
</form>

[/QUOTE]

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