How to use the RUNAS command from QM

[TheVig]

Trying to get RunAs to work in QM 2.3.2.5
Having troubles figuring out how to get a password.
Error (RT) in Function86: failed: the password must be encrypted (Options -> Security)

So what do I do in the Security tab?
When I try to "Encrypt the password to use with a function" I get a QM error message saying "The function does not support encrypted passwords"
So is there something I need to do to the function?

Thanks,
Jimmy Vig