vfpoledb 在xp+apache+php 下运行不正常,该怎么解决

vfpoledb 在xp+apache+php 下运行不正常
vfpoledb 在win2003 +apache+php 下运行良好 在xp+apache+php 下运行不正常

define ("vfp_oledb_CString", "Provider=VFPOLEDB.1;Data Source=d:/newdf; Collating Sequence=MACHINE");


$conn = @new com("ADODB.Connection") or die ("ADO连接失败!"); 
$conn->ConnectionString= vfp_oledb_CString;
$conn->Open(); 
$conn->CursorLocation = 3;

?>

Fatal error: Uncaught exception 'com_exception' with message 'Source: ADODB.Connection
Description: 对象没有提供' in D:\chinaz.com\WebSite\testado.php:7 Stack trace: #0 D:\chinaz.com\WebSite\testado.php(7): com->Open() #1 {main} thrown in D:\chinaz.com\WebSite\testado.php on line 7