Replacing a Cert

Our iChain servers use wildcard certs from Entrust. They are expiring,
and I'm trying to replace them with minimal fuss. The last time this
happened, I imported the new certs into IE, saved them as .PFX files and
copied them into sys:\etc/proxy/appliance/config/user/cert/backup
then used the 'Restore certificate' feature in the iChain web interface
to apply them. Worked a treat. When I try it now, I just get "-1226
Expecting certificate."

Does anyone know what might be happening here?


Thanks