A Fight to Fetch!

mysql:
showall() = select * from sometable;
class.php:
class EMP_LOGIN
{
function EMP_LOGIN()
{
}
function showall()
{
$myrset = mysql_query("call showall()");
return $myrset;
}
function getemp($somevar)
{
somecommands;
}
}
page1.php:
$myobj = new EMP_LOGIN();
$myrset = $myobj->showall();
$myrow = mysql_fetch_array($myrset);
echo($myrow['EMP_ID']);
page2.php:
//First procedure to get details for a single employee
$myobj = new EMP_LOGIN();
$myrset = $myobj->getemp($_SESSION['EMP_ID']);
$myrow = mysql_fetch_array($myrset);
echo "Welcome! ".$myrow['FIRSTNAME'];
echo " ".$myrow['LASTNAME'];
//This procedure is to get dashboard with all employee details
$myrset = $myobj->showall();
$myrow = mysql_fetch_array($myrset);
echo($myrow['EMP_ID']);

Page1.php works well but page2.php returns Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource
What went wrong. Is it wrong to access two objects in a single page. Help needed.

 

please print the sql statement before firing the sql query .. it will help to find the root cause