columns :compare two lists

I am trying to compare two columns (A and B) using this formula :
=isna(match(a2,$b$2:$b$14,false))

I copied this from the excel online help documentation and still excel is giving me the "formula error".
Can anyone tell me what s wrong with it please?

Originally Posted by NBVC

Are you on a non-US version of Excel?

Perhaps the commas need to be replaced with semi-colons.

e.g.

=isna(match(a2;$b$2:$b$14;false))

Thank you thank you so much,it does work now!!!

Oh lord,i had an us version that i got while i was in college in New Jersey then a friend of mine brought a version from Europe last month that i installed on my pc.Did not know the version in Europe is different then the one here in North America.
Should i go back to my us version?
They are both 2003
Thanks again!