ISP's following robots.txt guidelines, possible?

[synergytheory]

I ask because I have a client with an off-line, marketed domain [short] and an online, search engine optimized domain [longer].

The off-line marketing domain is a "click here to enter" type page, we block bots from the page with a noindex,nofollow and a robots.txt

Our client is saying that some of her visitors can't access the off-line shorter domain [which is blocked using robots.txt etc] but can access the longer domain which isn't using a robots.txt to block the bots.

I was wondering if some smaller ISP's that use a cache, are seeing the robots file and not caching the site?

Just for the record I know a 301 redirect would work better than an entry page and I will use a 301, when I figure out why the above is happening.

[bhartzer]

I was wondering if some smaller ISP's that use a cache, are seeing the robots file and not caching the site?

No, that generally doesn't happen. Without knowing the domain in particular I'm unable to give you any other specific reasons why it's not accessible. You might try looking at it through something like Rex Swain's HTTP Viewer to see what response codes are being given.

Do you have any indication of what those users are getting when they try to access the domain?