Linux Fedora 14 – extract wont work

I have two two packages in my Download directory, but they won’t extract:

”extract here” =>
Claims that a mistake was occurred but gives no further explanations.

”extract here” =>
gzip: stdin: unexpected end of file
/bin/gtar: Child returned status 1
/bin/gtar: Error is not recoverable: exiting now

I’m using Fedora 14

Thanks, possible connection problem.