NAS- Creating a Job for Low Level Code calc

Hi,

I'm trying to create a entry in Job Queue to calculate the Low Level Code but an error in the Log entries has "The codeunit was called with a Job Queue Entry record. It has no parameters."

I've never created a Job queue before....
I have a NAS snapin service running for the correct db/company with a valid user.
The Job Queue is Active.
I can see a Process running and I even saw for a split second the LowLevelCode calc codeunit running.
I've copied an existing codeunit and modified it so it has no output or prompts by suppressing all output and it works interactively. i.e. You just run the codeunit and it will finish in a couple of minutes.

Can someone point me in the right direction.

I'm running Nav 5sp1 on SQL 2005.

Thanks!