Help with generating a stack trace on IIS6

Hi All, My company has recently switched its servers from apache 1.3 to IIS 6 ... not for technical but for business reasons. Well, we have tried using different versions of PHP, 4.3.7, 4.3.8, 4.4.2 ... but with every ISAPI config, we are getting "PHP has encountered an access violation at XXXX" .... I have searched extensively across bugs.php.net ... but could not really find much helpful solutions. I know that without extra debug information, its difficult for anyone here to be much helpful but my problem is I have tried IIS's Microsoft Diagnostics Toolkit ... without much help. IIS does not die when the error occurs and I cannot get the information that the "how to file bug report" page says. I would appreciate if anyone can help me in finding out how to obtain extra information from php ... I am not able to find a debug pack for PHP 4 .... Thanks Sharad