HP Procurve configuration backup using SSH problem

Hello,

We have an HP Procurve J4903A Switch 2824 and it is integrated with RADIUS Server for authentication.
We are using Cat Tools 3.4 demo version and tried to configure the switch for configuraton backup using Method SSH2.
And using Device.Backup.Running Config  Type and SSH Username/Password are supplied. When Run the backup it shows the errors:
"Did not receive expected prompt when entering enable mode", and "Aborting: Unable to enter enable mode".

Do anybody faced this issue with SSH? Please help me to solve this problem.

Regards,

Achu