F key problems with DOS program under XP

One of our customer is having trouble running a DOS application (Symantics Q&A WP) under XP in that not all CRTL+Fn keys work - notably CRTL+F6. If we boot the machine under DOS, CRTL+F6 works fine. I am guessing that it is something to do with XP's handling of keyboard codes under a command prompt but I don't know what. Any one got any ideas?
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Is it a Logitech keyboard with a button on it that says 'F MODE'? If so, try pressing that button...
Also, Microsoft Natural keyboards have the "F-LOCK" component... You may make sure that this is off as it will cause Fn key problems.
infoquest-ukAuthor Commented:
Thanks for your replies but we have tried a standard simple PS2 keybaord as well as the installed Microsoft Multimedia keyboard with the same result. The MS Keyboard does have the 'Function Key Lock' button and that is selected before we try the Crtl-F6 combination. Interestingly Crtl-F9 works!!
infoquest-ukAuthor Commented:
Further update - more research seems to show that the problem exists with XP SP3 but not with SP2. So, what keyboard handling changes occured in SP3 - registry changes in the area of keyboard scan codes perhaps?
infoquest-ukAuthor Commented:
Problem solved - The SP3 v SP2 issue was a red herring. Basicaly XP controls the keyboard scan codes as they get sent to any application, including a DOS prompt and after lengthy research I found that it was an InterVideo DVD remote control application wincinemamgr.exe that was stealing Ctrl/F6 and this app was loading at startup. With it removed Crtl/F6 returned.

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Windows XP

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