Copying Encrypted Stored Procedures.

I have several stored procedures, created in a development environment,
that I need to move to a 'QA' environment, and then in turn, to various
production environments.
When I move these stored procedures, I would like to encrypt them,
using the 'WITH ENCRYPTION' clause.

My question is, how do I copy these stored procedures from development
to their target SQL server environment in an encrypted state?

Up until now, we have been moving them by generating an SQL script and
then executing that script on the target server. I have tried this
using a script with 'WITH ENCRYPTION' specified within it, but it
doesn't appear to work when I try and execute that script on the target
server.

Any advice would be greatly appreciated.

Nick.