Error: Installer Package cannot not be opened (999)

MegaByte

Registered
I have a .mpkg file that No matter what I do I get this error:

"The Installer Package cannot not be opened.
There was an uinknown error with the package (999)"

I've burnt to CD with Toast. I've created a master CD with Disk Utility, then burnt to CD, then tried to mount it and open it. I used Installed to open and it. I've opened it directly from the HD. I've used stuffit 8 and 10 to unstuff it.

I have OS X.3.9

Any ideas? Anything I'm missing?
 
Have you tried downloading that installer again? You may have a corrupted download.
What is the installer for? You might have something that won't install in 10.3.9, and needs an older system, or newer!
 
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