solved - assertText error

environment : win7, firefox 13, ide 1.8.1

i want to assert the text 'This forum is created to spread and acquire knowledge about hidden secrets of 'Selenium' web application testing tool. ' of this forum :

command : assertText

target : //div[@id='logo-desc']/p

value : This forum is created to spread and acquire knowledge about hidden secrets of 'Selenium' web application testing tool.

but the result is :

[error] Actual value 'This forum is created to spread and acquire
knowledge about hidden secrets of 'Selenium' web application testing
tool.' did not match 'This forum is created to spread and acquire
knowledge about hidden secrets of 'Selenium' web application testing
tool. '

why this error happened?

Thanks

Its working fine..check whether there is space for value (both at start and end)..It will not work if space is there..

Thanks rohit13.
i copied the value form html source directly, so i thought it should be right. and now i found that there are 2 additional space in the value, one is in the end of value, one is in the middle of value.