Certificate Error!

[Ivan Kalik]

>and then copy ca.der, client.p12 then I install the certificate into Windows XP.
>
>When click the client certificate and it shows
>
>"Windows doesn't have enough information to verify this certificate"
>
>Server cert in Trusted Root Cert
>
>"This certificate has expired or is not yet valid.
>

And below there is a line Valid from ... to ... - what are the dates?

Ivan Kalik
Kalik Informatika ISP