My computer has Pentium3/Win 98/64 MB.
However, there was the above problems.
This preview pannel is one of the most advanced function among
Morphing Program.
In the end, I solved this problem.
Please proceed Start/Set-up/Control pannel/Display/High-grade/Capacity
at your PC.
At this window, control Hardware Acceleration.
Namely, there is 4 steps from not-use of Hardware Acceleration to use
of Hardare Acceleration.
In these steps, please choose 2nd step.
Then, this problem will be solved.
I killed much time to solve this problem.
But, you need not.
