Large multiple selection lists in profile builder- need some help

I have an portal where I want people to be able to do multiple selects for "languages" and "countries" in their profiles.  I used the predefined dataset for "language" by entering *!Language in the "possible values" area and this worked perfectly.  When I tried this for "country", however,  I got this message:

Mysql error:
Too many strings for column Trade_Country and SET

Obviously, "Country" has more possible values then languages- 200 or so I think.  Does anyone know how to get around this?  For consistency reasons I would prefer to use the pre-existing datasets.