can't display page without URL ending with /

[Druid]

I'm running apache on my windows box...via PHPtriad. Apache 1.3.23. My problem is:

If i go to my site, both work: http://example.mine.nu/ and http://example.mine.nu

But if I go to a subdirectory, it doesn't work: http://example.mine.nu/testing

But this works: http://example.mine.nu/testing/

The testing directory does have an index file, but it seems the / makes all the difference. URL's to file's work fine. Is there a setting somewhere I can edit to allow both URL's to work, with or without the last slash?

Given example URL isn't valid, just used for an example...