error importing old mysql db

Hello,
I am using mysql 5 and trying to import a database from version 4.
But it keeps on giving me erros about invalid dates (e.g 2004-04-31)
and Error 1265 (data truncated for Column X at row 1)
I know it is some settings problem but don't know where to make
changes. Any help would be much appreciated.

Thanks.
Usman