FTPS VIP on port 990 not working.

Folks,

We have an application behind the F5 and we have a VIP configured for port 990 on the F5.

The challenge here is that we need the F5 to accept encrypted traffic, however, traffic should be in clear text when going to the backend servers.

As of now this is not working.

Does anyone have a solution/comments on this kind of an architecture?

Regards,

N!!