You're going to need to provide more information if you want any help on this issue.
Is your dataset filled properly? When you debug it, do you see your data? If not the problem could be in the c.resume() function and we can't help you fix it without seeing that code.
Otherwise it could be in the Crystal Report. Did you setup your links properly in the Database Expert menu?
You say your data is not displaying...all of the data? Or just the detail section? Do you get any error messages?
You may want to start by researching crystal reports in the
CP Articles[
^].