File Upload Validator

<>
< Text="Upload File" />>
<><>
< id="RegularExpressionValidator1" runat="server"
ErrorMessage="Only mp3, m3u or mpeg files are allowed!"
ValidationExpression="^(([a-zA-Z]:)(\\{2}\w+)\$?)(\\(\w[\w].*))
+(.mp3.MP3.mpeg.MPEG.m3u.M3U)$"
ControlToValidate="FileUpload1">><>
< id="RequiredFieldValidator1" runat="server"
ErrorMessage="This is a required field!"
ControlToValidate="FileUpload1">><>