Overriding SPMetal Defaults by Using a Parameters XML File

hi everybody,
I have a datatableEmployee below :
FullName Single line of text
AgeNumber
......

After use SPMetal to generate entities, i haveEmployeeItem below:
FullNamestring
Agedouble?
.....

I want Age is Integer so i use "Overriding SPMetal Defaults by Using a Parameters XML File" :

<?xml version="1.0" encoding="utf-8"?><Web AccessModifier="Public" xmlns="http://schemas.microsoft.com/SharePoint/2009/spmetal"><List Name="Employee" Type="Employee">	<ContentType Name="Employee" Class="Employee"><Column Name="FullName" /><Column Name="Age" Type="Integer" /><ExcludeOtherColumns/></ContentType></List><ExcludeOtherLists /></Web>

<Column Name="Age" --error here-- Type="Integer" />

Would you like help me?