Image Loading Speed on web server pages (IIS4 - Acrobat PDF)

[Mat G]

We have created a 2-page PDF document using Acrobat 5 and when you
load it locally, it loads fast (as you'd expect). But when it is
placed on our IIS4 Intranet server, there are two images (out of about
12 on the two pages) that take about 30 seconds each to load.

We create many PDF documents and serve them all up on our Intranet -
never seen this problem before.

Not sure what types the images were initially - it wasn't me who
created them, but they seem like standard lo-res clipart.

Any suggestions,

Many thanks,
Mat G
Birmingham, UK