COM / PHP / Multiple parameters

[Anon]

I have a COM object with interface like that GetValue([in, out] int n1, [in, out] int n2)

and method is
GetValue(int n1, int n2)
{
(n1)=10;
(n2)=10;
}

I call it in php
$ComObject->GetValue($n1, $n2)

The com receive the value from php, but php do not retrieve value modified by the com...

I am running php 4.1.1 w2K...

Could u help me understand this ??
Thanks