Macbook Pro freezes after installing new 4GB of Ram

So I have a 15" macbook pro (2.4Ghz) that I've had for a few months. It's been pretty good so far, but I've been using it for Ram-intensive programs such as Adobe Photoshop and Illustrator, as well as Logic. I only had the 2GB of Ram that it came with, and I was noticing some latency. So I did what everyone recommended and upgraded the Ram to 4GB. I purchased some at my local computer shop (s598: Super Talent 4GB SODIMM DDR3 1066Mhz) I just posted the exact numbers posted on the packaging for this item. I know I need DDR3 1066Mhz, but I'm not sure what the S598 stands for.......
Anyhow, I just installed this today. And it seems that the system doesn't get bogged down AS much. But my laptop has COMPLETELY frozen up twice within a couple hours and I've had to force shutdown the machine... Is this the RAM causing this?? Would anyone know if installing this Ram can be problematic? Any help would be appreciated. Thanks!

All of the new unibody MBs/MBPs can use (6GB 4X2GB)
But yes you should definitely make sure the RAM is seated correctly and you didn't touch the gold part of the RAM during installation. Though if something was seriously wrong it would have made loud obnoxious sounds while you tried to start up.
Aside from Installation issues, you should reset the PRAM as noted previously. Hold down command-option-p-r at startup until it chimes twice.
OP, looking at Super Talent's website they don't even have 1066MHz chips listed in their DDR3 chips. All I see is a jump from 800MHz (DDR2) to 1333MHz (DDR3).
Either way, I can't imagine you got that great a deal for the RAM that even if it is seemingly the correct RAM you can get better deals in the links I posted in my other post.

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