Nine out of ten says that you have a defective product.

Did you select any options for the verbal language? Disc 3 of Season 1 has the following options for sound:
French: Stereo Surround
Spanish: Stereo Surround
English: Stereo Surround
*also iincludes Featurette: Profile on General Hammond

*
Are you sure you have it set to English? Try it out. If so, and it still doesn't work, then go return it because it has to be defective.
Anyways, it was a nice episode. It was one of those episodes that has set certain standards on how the SGC obtains new technologies and uses them throughout the show.
"The very young never do as they're told."
- one of the Nox