FCE won't accept my Serial Number

Question

I bought a copy of Final Cut Express HD (version 3.5 universal binary) in August but waited to install it until I got my new Mac. I bought the new Mac last week (24" iMac with a Core 2 Duo chip) and tried to install tonight.
When I enter my serial number, the program says "The serial number you entered is not valid".
Yes, I double and triple-checked every character. I am sure I'm using O and 0 (and 1 and L) properly. I am using hyphens where indicated (though I also tried without). I am using uppercase (though I also tried lowercase). The format is one character followed by nine triplets as I've seen other people mention.
This is a brand new package of FCE. I don't want anyone else's serial number, I just want mine to work. Could it possibly be an incompatibility with the new 24" iMac???
24" iMac   Mac OS X (10.4.7)   Core 2 Duo 2.33GHz
iMac   Mac OS X (10.4.7)   Core 2 Duo 2.33GHz

Answer 1

I had a similar problem when installing FCE 1.0.1 on an old G3 iMac recently.
The problem turned out to be that the cursor was not at the start of the serial number box - for some reason it was one space along, which is too small for you to notice.
All I did was press the backward delete key to ensure the cursor was actually at the start of the line. Also DO NOT press the spacebar when you have finished the number.
Ian.
PS.
1. ALL letters are upper case.
2. Each triplet is composed entirely of either letters or numbers - not a mixture.
3. The hyphens MUST be included and are all these kind - not these _
4. There must be NO GAPS - either between the symbols or at the beginning and end of the serial number.
Here is what a serial number should look like (it's a fake of course!):-
A-123-ABC-456-DEF-789-KLM-890-RST-SAS