[magick-users] Newbie Problems with NTDLL Error Message

[Mcgill, Wayne CIV NAVAIR 5, , 111F]

I am a newbie trying to learn and use IM on Windows XP.
I have had success but one thing is still giving me troubles.
I am trying to create a web-site of historical photos and
documents.  Previously, I had a friend us a commercial program
to resize and shrink the photos (mainly JPEGs from digital
cameras and TIFs from scans).  He resized them to approx. 875x700.

One operation I am trying to do is to add a caption.  My idea was
that when the user clicks on a thumbnail, it brings up a large
image (with a caption) in the browser.  I am trying to use IM
to add a "caption" block on the bottom of each photo.  I have
been able to create the caption blocks (x700) but whenever I
try to add them to the bottom of the large image, I get a
"... do you want to send Microsoft ..." error message similar
to this:

    AppName: convert.exe    AppVer: 6.3.5.0   ModName:  ntdll.dll
    ModVer:  5.1.2600.2180    Offset:  00017a8c

Here is one of the commands that gives the error above:
    montage Photo_437.jpg Photo_437_caption.gif Photo_437_montage.jpg

This happens whenever I have tried to either Montage or Convert.
I have tried Splice and Append but with the same error.  The
error also occurs whenever I try to create Thumbnails.

These commands seem to work on newer photos that I have used
IM to resize and shrink.  So what did my friend do to the
photos that IM does not like?  Any help would be appreciated.

THANKS, Wayne  wayne.mcgill at navy.mil