Error 0x00000080 on Photoshop CS4: Memory Could Not Be Read

Hi,
The problem is with my Photoshop CS4 running on my Windows XP Operating System.
It is throwing an error message regarding application error.
It indicates, "The instruction at "0x696336ab referenced memory at "0x00000080".
The memory could not be "read". Click on OK to terminate the program.
Click on CANCEL to debug the program".
What does it mean?
Have you any idea?
Please help.
Thanks in advance.
