Paradox + composite key

Hi

I have a problem with a composite key in the Paradox database. I want to 
select rows using a list of key pairs I have. I want to use IN clause. In 
most relational databases it would be something like that:

SELECT * FROM Table1 WHERE (A,B) NOT IN ((1,1),(2,10))

A and B are composite key.

But in Paradox (standard version on Windows XP) it doesn't work.

Regards

Andrew