Help! can't move 2+ photos between albums in xoopsgallery ??

I'm now running xoopsgallery 1.3.3.3 on xoops 2.06 but
each time I tried to move more than 2 photos between albums,
the pop-up screen stoped at
" moving #5...
" moving #6...

and it results in only 1 photo successfully moved.

this problem actually happened once on my stand-alone gallery server as well. but only once.

I tried to turn on the debug mode and got the following error message.
Can anyone help on sharing ideas solving it ?
it's really a nightmare to re-upload once and once again just to move photos between albums...
and sometimes you have to re-enter those descriptions...

------------------------------------------------------------------------------

Moving photo #5

Executing:

/usr/bin/jhead /var/www/html/modules/xoopsgallery/cache/albums/album12/aag.jpg

Results:
File name : /var/www/html/modules/xoopsgallery/cache/albums/album12/aag.jpg
File size : 477125 bytes
File date : 2004:04:30 17:05:12
Camera make : KYOCERA
Camera model : Finecam SL300R
Date/Time : 2004:04:12 11:02:16
Resolution : 1600 x 1200
Flash used : No
Focal length : 21.9mm
Exposure time: 0.0029 s (1/350)
Aperture : f/2.8
ISO equiv. : 100
Metering Mode: matrix
Exposure : program (auto)
Jpeg process : Baseline

Error messages:

Status: 0 (expected 0)IN UTIL ITEMCAPTUREDATE = 2004
Moving photo #6
.....

((( some omitted. the message's mostly the same on moving photo #6 )))
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