The network is laid out with an XP Pro computer as the server hosting files, then 3 XP computers connecting to it for filesharing, all on it's own router. One computer can open .xls files no problem, and she runs Office XP. The other two computers run Office 2003, and cannot open any shared files by double-clicking them, or by selecting File->Open in Excel. If the file gets copied to the local computer, it opens instantly. I have tried disabling the AV on all computers, disabling the Windows firewall, and doublechecking permissions on the server. I have also tried disabling DDE, but that doesn't help at all, just like Tools->Options->unticking Ignore other applications. Any ideas? This apparently started a couple days ago