FTPS error: peer certficate rejected by chain verfier.

Hi Expert,

I am working on Proxy-->PI-->FTPs scenario.

The FTPs server side send us three .crt certficate. we have import the same under Trusted CA--->import entry-->X.509 entry one by one.

When I run the scenario I am getting error

I had checked the CN name in all the 3 certificate its not the FTP server hostname.

Do that certificate need to have the ftps server host name.
Also please let me know how I can upload the certerficate maintaing the chain order as when i import the certificate under Trusted CA--->import entry-->X.509 entry it dy default get matain in alphabetic order.

Thanks & Regards

Kasturika