Mapped Drive Error

> Hi. I'm experiencing an error message when I try to connect to a
> mapped drive using a programs 'open' or 'save' dialogue box. The
> message looks like this:
> The drive or network connection that the shortcut 'target.lnk' refers
> to is unavailable. Make sure that the disk is properly inserted or
> the network resource is available and the try again". I click on Ok
> and it goes through to the drive. This is simply an annoyance. Why
> does this happen, and how can I make it stop?
>
> The machine I'm connecting to is a winodws 2003 server and the
> workstation is running windows xp professional. Thanks!
>
> Mark