Subdataset and Main Report Parameter

1) I am using a parameter called $P{Term} for the main report query.
My sql expression is:
SELECT
term,
gender_name

FROM
table
WHERE
term = $P{Term}
GROUP BY
term,
gender_name
2) I am using multiple cross tabs and would like to use subdatasets. I need to pass the same parameter($P{Term}) to the subdataset. I am not sure how do I do that ?.
My sql expression for the subdataset is:
SELECT
term,
class_level
FROM
table
WHERE
term = $P{Term} AND
class_level ='X'
GROUP BY
term,
class_level

Note: I tried to add the parameter)$P{Term}) to the cross tab by..a) right clicking on the crosstab
b) cross tab properties
c) under sub dataset properties > parameters tab
d) clicked on add
e) selected $P{Term} as default expression and name 'term'

But it does not recognize the parameter....says unknown parameter 'term'
Please help me on this. Thanks in advance