You can also do this by going into SIMS and then going into My Marksheet Entry.
Finding the class.
In my case
Sum 2009 Forecast 01/J630 : 10a/Ds7 08/09
and checking the entries are OK there.
For instance I have Y in the columns
OCR A213F Entry Summer 2009
and
OCR A214F Entry Summer 2009
ONLY
which is
B3,C3,P3 paper and the ideas in context paper.