No he provado el código que dices, pero intento ayudarte a encontrar la solución santus. Me encontré esto en la página de Macromedia:
Cita: Issue
When attempting to view an asp page with a code page directive, the following error is generated:
Active Server Pages error 'asp 0203'
Invalid Code Page
/mySite/myPage.asp, line 1
The specified code page attribute is invalid.
or
Active Server Pages, asp 0203 (0x80004005)
The specified code page attribute is invalid
Reason
Internet Information Server 4.0, with Windows NT Service Pack 4 or greater, does not support code pages. This creates a problem with some double-byte character sets that extended beyond 2 bytes in size.
Solution
The web server running Internet Information Server 4.0 must be upgraded to Internet Information Services 5.0. The following Unicode code pages are valid with Internet Information Services 5.0:
UTF-7
UTF-8
¿Se aplica esto a tu problema?