help

[Simon Sin]

Hi! I'm new to Haskell.  Following someone's notes, I was doing this
"doubleMe x = x + x".  I did this two days ago and it worked.  But I try to
do it today, I got an error "parse error on input '=' ",
This is rather inconsistent and should not happen in a computer compiler
(i.e. day one works, day second not work) This comes up in both cases:
loading a .hs file and interactively.  Can anyone tell me what I did wrong?
 This happened to both my Win XP and my Ubuntu 10.10 PC.  Thank you very
much.  Cheers.  Simon.
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