Need some help with RetroPie - Raspberry Pi

[TPR]

Hey everyone - Thank you in advance for the help. Let me give you a little info on my setup. I have purchased an custom-built system that was fit into a ColecoVision Flashback (which in theory is pretty damn sweet!) and here's what it looks like: http://atariage.com/forums/topic/245910-colecovision-flashback-upgrade-service/

From what I can tell, I have a Rasberry Pi 2 with (I'm assuming) is the latest version of Retropie and Emulation Station on it.

It has been configured mostly to play ColecoVision and Intellivision games, and I have no problems at all with those. I also have been able to get PC Engine, MAME, and Vectrex games to play.

Here's my issues:

1. When I try to add roms for Atari 2600 I get the following error:

stella: src/emucore/OSystem.cxx:1128: virtual bool OSystem::queryVideoHardware() 'myDesktopwidth >=320 && myDesktopHeight >= 240' failed. /opt/retropie/supplementary/runcommand/runcommand.sh: line 203: 2400 Aborted SDL1_VIDEODRIVER=displaymax stella /home/pi/RetroPie/roms/atari2600/asteroids.bin

If I try to run Stella from the command line of the Pi, it works just fine.

2. I cannot get Atari 5200 roms to work. They show up in emulation station, but when I click a rom, it blanks out, and nothing happens and comes back to ES. The last message I get is "Powering on HDMI with preferred settings."

3. I cannot get other systems, like SNES and NES to even recognize that I've added roms into their respective folders. I've checked the es_systems.cfg file to see what directories and file types they are looking for, and from what I can tell, it's correct, but nothing happens.

Any help would be greatly appreciated. I'm a noob to the Pi and RetroPie, but I at least have a good enough tech savvy understanding of how a lot of this works, and I've scoured the internet as much as I could trying different things before I posted my questions.

I am also attaching my config files if that is useful.

Thanks in advance for your help!

configs.zip