Error Found: Expected type is DateTime (when merging dataset with typed dataset)

Hi,

I am getting this error: String was not recognized as a valid DateTime.Couldn't store <0000-00-00 00:00:00> in dob Column. Expected type is DateTime.
when i merge the normal dataset to typed dataset

Note:
dob filed is having this value 0000-00-00 00:00:00 in database.

using select query i am getting few records and dataset
and the same (dataset) is merged in Typed DataSet.
(When i merge the dataset to typed dataset i am getting the above error.

Note: as in typed dataset dob field type is datetime


expecting your valuable reply
regards,
Thiru.