[TYPO3] Editing a backend extension: why is my function undefined?

[Lasse Guldsborg]

Hi list!

I'm trying to edit a backend extension. (loginusertrack)

The index.php already contains a number of functions.

I have tried to put in a new function between the others, but I get this 
result:
Fatal error: Call to undefined function myfunction()  ...

Why is it that my functions is considered "undefined" while the others are 
fine?

Best regards,
Lasse