Frequently Asked Questions

Technical : Access

'Invalid Request' Error Message - I receive an 'invalid request' message when I try to log in, what is going on?

Sorry for the inconvenience. One of three issues is causing you to receive the "invalid request" error. Each of the issues is detailed below:

The only way that you receive an 'invalid request' is when your browser does not present a valid HTTP_REFFERER code with its request for a url/page.

The HTTP_REFERRER is the code that shows the url that your browser was displaying when you clicked on a link. For instance, if you found us from Google, the HTTP_REFERRER would be www.google.com.

Our authorization protocol requires that you link to a resource from one of our valid urls. You are receiving the 'invalid request' error because the HTTP_REFERRER is blank. Whatever is stripping the HTTP_REFERRER code needs to be fixed.

Either a setting in your browser ( and at this time we know of no such setting, though it is possible), a malfunctioning pop-up blocker, or a firewall on either your PC or the corporate firewall is stripping the HTTP_REFERRER and leaving it blank.

--->FIREWALL ISSUES<---
Norton's Personal Firewall basic version and ZoneAlarm's basic firewall both work without issues. It is their advanced versions that malfunction by stripping the HTTP_REFERRER field before the display page gets to your browser.

For Norton's firewall, you must turn Privacy Controls off.
For Zone Alarm, you must turn Cookie Control Off.

Corporate firewalls need to allow the passing along of this HTTP_REFERRER field as well.

--->POP UP BLOCKER ISSUES<---
Another potential cause of the problem is the manner in which some pop up blockers operate. They all read the incoming pages and 'comment out' text that contains javascript pop up coding. If they preserve the HTTP_REFERRER variable when they forward the page to your browser, you will have no problem. If they don't.... the 'invalid request' error is what you will get.

--->BROWSER ISSUES<---
Finally should any software on your PC block cookies, you will not even get as far as the INVALID REQUEST screen.

You need to set your browser to accept cookies or at least accept them from http://www.mtclibraries.com

If you need help doing that, please email us back with the following information:

1) confimation that you do not have firewall software operating on your computer

2) the name and version number of your browser ( e.g., Netscape 6.0 or MicroSoft Internet Explorer 6.0, Mozilla 1.2 , etc )

3) the operating system on your PC (Windows 98, Windows NT, Windows XP, etc)

4) To your knowledge, have you ever turned the 'auto form completion' option on.

Accessing the library is only a matter of straightening out those settings.