Can't Preview and Print Quick Report

We have application with Quick Report3.0.5 installed in customer site. And
when we updated the Quick Report to 3.6.7, we can't preview and print the
report at all. But with the older version, at least we still can preview it
although printing didn't work. And when we tried to back to the older
version, nothing does work.

Does anybody know how to solve the same problem?

The customer's OS is Windows 2000 5.0 service patch 3

Thanks!