Effective 1 January 2011, we will no longer support any Certificate Signing Request [CSR] generated with a 1024 bit key. This is because NIST, PKIX, WebTrust and other respective security standards no longer consider the 1024 bit key size as secure. Read more > [1]
We recommend that you make a note of your password and backup your key as these are known only to you, so if you loose them we can't help! A floppy diskette or other removable media is recommended for your backup files.
Links:
[1] http://www2.digi-sign.com/about/announcements/2048