Why am I being asked to log on to my database?

Hi,

I have written a winforms application over a year ago. When I did, I used CR for VS. I had no problems creating reports. I have started a new application, and am having problems running a report.

I can design the report with no problems, but when I run the program, I get

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My database does not need credentials. I get this in the IDE. I originally got this using VS 2012 with CRforVS_13_0_8. I tried it on another machine with VS 2010 and CRforVS_13_0_7, and got the same thing.

Am I forgetting to do something? Both machines are running Windows 8.

Thanks,

Dotty