There is one of 2 things that seem to be wrong.
1. The file you downloaded is not complete, is corrupt, or
2. You haven't read all the documentation for the C3000
There are files specifically designed for the C3000's small flash. I don't have a C3000, so I cannot go into detail here.
Look on the page I linked, there are these files:
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updater/flash utility for C3000
Use Akita updater/flash for C3100/C3200
* updater.sh (20KB) - v0.26
* updater-tools.bin (1.2MB) - build 15
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kernel and updated bootloader for C3000
These are absolutely for C3000 only
* initrd.bin (2.5MB) - 0.5a
* zImage-2.4.20.bin (1.1MB) - 2.4.20
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Also make sure you have read all the documentation on meanie's page.
http://www.users.on.net/~hluc/myZaurus/pdaxii13.htmlEDIT:
I don't mean to sound harsh, but the SL-C3000 is completely "different" from many models in regard to flashing various ROMs, because it has such a tiny "Flash" memory area.
Jon