Not validcvc-complex-type.2.4.d: Invalid content was found starting with element Employee. No child element is expected at this point

I am using webservices.Using the below xml code.I am getting the error which is below while running the code.

Not validcvc-complex-type.2.4.d: Invalid content was found starting with element 'EmployeeAllergy'. No child element is expected at this point.

Here's the code:

<EmployeeAllergy>
        <allergyID>1020</allergyID>
        <allergyTypeID>FDB</allergyTypeID>
        <allergySeverityTypeID>Mild</allergySeverityTypeID>
        <allergyComment>ssss</allergyComment>
        <onsetDate>20140317</onsetDate>
</EmployeeAllergy>

Any help would be greatly appreciated.