powerpoint2000 (CAI), courseware do not open on the version of office2007

powerpoint2000 (software) to do the courseware in 2000 and 2003 on the use of the normal version, but could not open the office2007 edition? why not? how to solve?

compatibility issues that should be it!

since 2003 can open, then you first in 2003 on the Save As of 2003, and then in 2007 to open it up!

ha ha! I will be the only way! I also appeared with species, as long as the office2007 version of the upgrade to the latest version and you can find the appropriate suffix, is the question of compatibility