PHP and Interbase connection

[double-g]

Dear all,

I know that this topic was already discussed in the past, but also reading all answers I didn't found a solution for my problem.

I'm developing a web site based on Interbase, with Apache 1.3.29, PHP 4.3.4, Interbase 6.0 on Windows XP Prof.

At beginning I put my connection information directly in the code, for example:

$host="localhost:d:/data/mydb.gdb";
$username="myuser";
$password="mypwd";

and the connection work properly.

When I put the connection parameters on a configuration file (NOT .PHP script included), in the format of .ini and parse with a PHP procedure in an array, I don't be able to connect any more, I get some different errors, such as "unable to complete network request to host ""localhost", "I/O error for the file" etc...

Anyone have any good idea ?

Thanks in advice