Masking a dynamic component

I created a dynamic table that shows countries and values for each country (from a text file).

That table was created with attachMovie

I want to display only a small portion of the table, so I want to mask it.

I tried using a mask in the upper layer but then it didnt display the data.

Note: [COLOR=teal]The move hierarchy is: _root > component Table > Movie Clip Table > (Script which create the table). [/COLOR]

¿Is there any way to do it by Actionscript or with scrollpane component? (or other way).

Ive tried with scrollpane but it dindnt show the dynamic data, only the graphics.

Thanks in advance,