user control error

Question

am using a user control on my page. its working fine on my local system. but when i deploy it to hosting it is showing an error.
"The base class includes the field 'PgHeader1', but its type (Page_PageHeader) is not compatible with the type of control (ASP.page_pageheader_ascx)."

Line 61:                      </td>
Line 62:                 <td>
Line 63:                      <myPageHeader:PgHeader ID="PgHeader1" runat="server" /></td>
Line 64:                 <td style="width:200px">
Line 65:                      </td>

how can i resolve it.