Excel 2007 : Time Formula

I couldnt get it work, I changed all the comma's to semi colons (I have excel in Swedish) but still it wouldnt work. Maybe, if you have time, you could look at the attachment and tell me where I am going wrong.

Thanks for all your help
Alan

EDIT
Forgot to change IF to OM
That works great.

Now with the morning journey, its reversed so that I count everthing before 07:30 but nothing after.

I just cant get the formula in reverse
This time I would like where a1 is the start time (Before 07:30) and B1 is the end time, as before but only calculated up till 07:30
eg a1 = 07:00 and b1 = 07:35, it will give an answer of 30 mins But I just cant get it.
Please can you help again.
Alan

EDIT

GOT IT!

Thanks darkyam for all your help.

Regards
Alan