might not related to vb, but I need your help

Any one have such experience?

when you click a link on the web which points to a .pdf file, it shows--
"the index associated with this document blah.pdx could not be located"

I went to that directory, and actually .pdx file is there, and when I double click the file, it shows--"the file is corrupted....".

the most weird thing is that it's only happening on a few machines, which I don't know why some doesn't need to locate .pdx file at all and works properly while some does.

besides rebuild .pdx file which I should use adobe catalogue , any quickier, easier way to work around this?

thanks