Cover using UnderCoverXP

I use above software but can not figure how to make a cover for a 5 disc dvd case that I am making for wedding pictures. There is an option to print a 6 DVD case cover but when I print it the print out is not long enough to cover the entire DVD. The spline is 1 inch as it should be but the wording is cut off on the back.

I am using 8 1/2 x 11 paper but tried it on 8 1/2 x 11 also.

Any suggestions?

Thanks