Adding Custom maps to Dedicated Server -> Wait for Host

[YoMma 10]

I wonder if anyone can help me out here. I did a search for this Wait for Host issue and found some discussion about it on ArmA one, but (probably due to "newbieness" on my own part, I struggled to see the solution)

When I upload a custom map to my server and place it in "mpmissions" and restart the server, once I join it it simply holds at Wait for Host. Several people mention setting a default map might solve this issue but I couldn't find out in my searches how to do that, or if there is another solution to this issue.

Sorry if this is considered double posting or something, I wanted to put this on the ArmA2 forum since I didn't see any discussion here about it.

I also have an issue setting my server to have 3rd person view disabled, but I guess that's a story for another day and I am still trying to get my head around the solution posted on these forums...