performing IMP/EXP with object types

hai guys,
I have an object of type called INFO and it is containing all the fields like created by,updated by,created on and updated on. this type INFO is refered in all my tables in database.
the problem is when i export the database with FULL = Y as parameter and export it into another database(both the databases has the idententical in all respects even object type has been created ) it is giving an error saying object identifier is not the same and object type INFO is already in use.
can any one suggest me the solution in this regard.since i have to do this very frequently.Thanks in advance
k.raghava rao