CrunchBang Linux

Greetings fellow #!ers, I am a bit new to Debian, but I have used Ubuntu and Mint for quite some time. My problem has come with my *NEW* toshiba Satellite L505D. I got it at a pawn shop just to have something to try out crunchbang on. It came loaded with 3G of RAM which I planned on upgrading to 4. #! installed perfectcly, but I started having real problems booting this damn thing once I replaced the 1G stick with a 2G stick. I have several 2G sticks that test O.K. in Eurosoft's P.C. Hardware Test and in the Crunch Bang Memtest, but I get crashes, kernal panics, and black screens at boot when I have anything but the 1G stick that came with the computer in the first RAM slot. It works even better when I have just a 2G stick in the second RAM slot. So, do you fellas think I need a BIOS upgrade or a new Motherboard, or are these RAM slots replacable, since I have the technical skills to solder. Any Feedback would be greatly appreciated. Thanks in advance.
Tech Note- I have three 2G Ram sticks that are 2Rx8 PC2, and the 1G stick that is the thorn in my paw is a 2Rx16 PC2.
Should I just stick with the 1G and a 2G or is there something I can do? Maybe a 4G stick in the second slot?
Thanks again.
-A new #! convert,
The Rizz