You don't specifically say this in your question, but I assume that the problem you are having is that you keep getting prompted to enter logon info when displaying your report. If that is the case, try setting all of the logon info dynamically in code before calling the report.
Here is an article on that:
csharp crystal reports dynamic login
(I assume that you'd just set the password to an empty string since you didn't set it.)
If that is not your issue, please include whatever error message you are getting or describe what exactly is happening. Does it give you an error message? What code do you have right now to display your report?