It may be set in the settings to send before autoswitch. I turn that off.

If you are clicked on the current slot, it will run to completion and call in.
It will simply run that slot to completion and keep doing send/receives if you leave it alone.

Go to the cache area. Either right at the beginning of execution above or after a checkpoint on the current unit (to minimize waste), right click in the area of the slots and click the second item, run oldest WU. It should then exit a new slot and go find the oldest one and start running it. It will cycle through them in date order without going to the net. I don't know what happens when it gets to the end. Mine's set to do nothing in that case. I've never waited that long. I usually send some in once or twice per day by clicking on each result that I see.

I have enough slots to last several days...if I'm away for a weekend or if the server is down.

If you have several percent done on the unit you left, don't worry about it. When the execution sequence gets to it again, it will pick up properly where you left it.

The first time?

That would imply some other problem if you can't load anything in the beginning.

It did load WU's into the Monitor but for some reason later on when the agent gets to it there is a pause until I can connect to the server. When I do it downloads a WU into that slot over top of the previously load WU. I am going to try running each one after it loads to insure all the units will run. Thanks for the suggestions.