Functional exit - EXIT_SAPLKOBS_001 not being called

Hi all

I am trying to include a code in the functional exit EXIT_SAPLKOBS_001 using enhancement COOM0003. I double clicked on the include function of ZXKOBSU01 & did some coding. I put a break point on the first line of m y code but when I do the internal order creation transaction KO01, it does not seem to call the user exit. Am I doing something wrong or am I suuposed to have access to something in particular....

The same thing happened when I tried to write some coding into the EXIT_RFEBLB20_001 functional exit & when I imported a lockbox file it never called the user exit...

Am I supposed to uncomment the first line which reads 'Include ZXKOBSU01' when I double click on the ZXKOBSU01....has anybody had the same problem before???

Thanks