Crystal Report 8.5 failed to do direct printing, but can preview and print

Our application is utilizing Crystal Report 8.5

When we try to print a financial report that compares 2 periods (np for single period), it would fail to do direct printing and our application hanged with CPU 100% loading.

However, if we do a preview and press the print button, there will be no problem.

Does anyone know how to solve this problem?