.bash_profile problem

Hi Guys,

I modified my .bash_profile script , and tried to change the prompt.
Following is the line of code in my .bash_profile script.

export PS1="[\u@\h] \W [\!] "

But I get the output as:

[\u@\h] \W [\10]

This appears to be my prompt now.
Any idea what should be done..

Thanks!