Ok I guess I know what happened there. Cause this thing is happened to me but I fixed it later. I am sure you must have put ur details correctly. If you are inland, then just mention ur location same as you mentioned in the application under where you intend to stay.
The tricky part is last option, How many applicants on this file, try plugging 1 there cause you are the primary applicant. Dont put the total number of applicants depending on you!
If if still doesnt work then just play with the numbers, cause you are allowed 5 times in 24 hrs. I am sure there is something with the number of applicants.