Memory could not be read error

Hello,
While I was using my internet explorer for browsing, the was an error message display on my screen, that says memory could not be read. The only option there was the OK button.

iexplore.exe – Application Error
The instruction at “0x01cc3812” referenced memory at “0x01dbf8c”. The memory could not be “read”.
Click on OK to terminate the program
If I will click on OK, the error message will exit and so as my internet explorer. My first impression with this problem is my RAM. I replace the my RAM with a new one. After it I browse the internet again and the same error came across the screen. I am very sure the memory I replaced is a good one, and now I am wondering what will be the problem on my computer.
Please help me solve this memory problem.
