Vb script encryption

Mar 5 2013 7:39 AM

set encData_byte As Byte() = New Byte(len( Request("txtPassword")) - 1) {}
encData_byte = System.Text.Encoding.UTF8.GetBytes( Request("txtPassword"))
set encodedData As String = Convert.ToBase64String(encData_byte)

The above code in VBSCRIPT for encryption runs fine while debugging website ..
but fails to run in IIS

Please help