I have created a universe and am able to create a report against it in Crystal Reports XI R2 (SP2). There are some users on my campus, however  (not all), who can connect to the universe, and pull in fields from the universe into the query panel. But, the minute they hit "OK" they get and error that says "Login Failed." There is no other explanation. I does not matter if the user is in my building or connected to my data port, they still cannot generate the query.

Thank you for your reply. The users do have the proper security on the db side. I discovered the problem to be with the installation package that was created where the data access components were not selected.

I think I am experiencing the same problems.  Could you provide more information on how you corrected your problem.