1) original code is:
=======================================================
$myServer    = "localhost";
$myUser      = "sa";
$myPass      = "sa";
$myDB        = "DB_NAME";

$db1 = @mssql_connect($myServer,$myUser,$myPass);
	mssql_select_db($myDB,$db1);


$sp  = mssql_init("STORED PROCEDURE",$db1);
$rs1 = mssql_execute($sp);

$rs2 = mssql_query("SELECT * FROM TABLE_NAME");

while($frs2=mssql_fetch_array($rs2))
{
 echo "<br>".$frs2["ID"];
}

while ($frs1 = mssql_fetch_array($rs1))
{
 echo "<br>".$frs1["A_TYPE"];
}
=======================================================

problem description:

this simple example works good when STORED_PROCEDURE ( see in $rs1 execute statement ) has only one recordset returned in query. 

But when STORED_PROCEDURE has more than one recordset returned in one query i get the error like 

mssql_query() [function.mssql-query]: Query failed in....