I updated my RAM from 1GB to 2GB and now my videos are choppy

When I first bought my Apple Macbook, it had 1GB of RAM [512 MB and 512 MB]. I just upgrade my RAM from 1GB to 2GB [1GB and 1GB]; I purchased my RAM from crucial.com. Since I installed the new RAM, all of the videos I watch have a choppy picture and distorted audio. Does anybody know how to go about fixing this? I've already updated to the latest Adode Flash. Here are my system's specs:

Model Name: MacBook

Model Identifier: MacBook1,1

Processor Name: Intel Core Duo

Processor Speed: 2 GHz

Number Of Processors: 1

Total Number Of Cores: 2

L2 Cache: 2 MB

Memory: 2 GB

Bus Speed: 667 MHz

Boot ROM Version: MB11.0061.B03

SMC Version (system): 1.4f12