We are currently using Office 2003 and have installed the MS Office 2007 Compatibilty pack. I have one user however that when we try to open a .xlsm file we get a message that the file converter failed. I have successfully opened the file on several simiarlily configured machines, both desktops and latops, the machine in question is a laptop. I have uninstalled & reinstalled the converter pack, office itself, downloaded and installed all updates. Any Hints, Tricks, Suggestions??