DHL Shipping Module Warning

[IHaveADotCom]

I just installed the DHL module and filled in the appropriate fields. When I went to test it, my Estimate window popped up with the following;

Warning: exec(): Unable to fork [/usr/bin/curl -d "<?xml version='1.0'?><eCommerce action='Request' version='1.1'><Requestor><ID>xxxxx</ID><Password>xxx</Password></Requestor>
<Shipment action='RateEstimate' version='1.0'><ShippingCredentials><ShippingKey>xxxxxxxxx</ShippingKey>
<AccountNbr>xxxx</AccountNbr></ShippingCredentials><ShipmentDetail>
<ShipDate>2006-09-18</ShipDate><Service><Code>G</Code></Service>
<ShipmentType><Code>P</Code></ShipmentType><Weight>7</Weight>
<AdditionalProtection><Code>AP</Code><Value>0</Value></AdditionalProtection>
</ShipmentDetail><Billing><Party><Code>S</Code></Party></Billing><Receiver>
<Address><City><![CDATA[]]></City><State></State><Country> in c:\domains\xxxx.com\wwwroot\cart\includes\modules\shipping\dhlairborne.php on line 463

Warning: Invalid argument supplied for foreach() in c:\domains\xxxx\wwwroot\cart\includes\modules\shipping\dhlairborne.php on line 465

Apparently, I have a problem with my setup but I really find it totally unacceptable that either Zen Cart or the module posted my ID, Password, and Shipping Key for anyone to view. This happens with debug on or off.

[swagger]

That looks like a PHP warning message. Check your error_reporting setting in php.ini.

[IHaveADotCom]

Could you be a little more detailed?

Where do I find php.ini and what setting am I looking for?