Freak kind of error with pk2tool

Hi guys.I have a little problem with my pk2tool , because when i try open media.pk2 with pk2editor i get this error... btw this tool taking about ~ 2gb ram?
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it can not read the blowfish key , try to use official joymax pk2 open/edit with same media.pk2 / any.pk2 password :)

Of which server are you trying to open the media.pk2.

It could be that the media.pk2 is somhow modified mabye a different key who knows. Also try the new version of drew's pk2 tools.
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i trying to open old atomix media.pk2, because with the newest i cant start up my server :F
Any way i will try to use those new tools =)
@edit
Everything works fine, thanks guys =)