Synchronzation of Assembly/UDF with parameter nvarchar(MAX)

If have a CLR scalar Function / UDF wich I can not synchronize to another database.

I got the error:

The following error message was returned from the SQL Server:

[1001] Line 1: Length or precision specification 0 is invalid.
Incorrect syntax near the keyword 'with'. If this statement is a common table expression or an xmlnamespaces clause, the previous statement must be terminated with a semicolon.
Incorrect syntax near the keyword 'EXTERNAL'.

Do you have any advice for me?
thanks,
Olaf

---

The following SQL command caused the error:

CREATE FUNCTION [dbo].[fn2_regexIsMatch] (@expressionToValidate [nvarchar] (0), @regularExpression [nvarchar] (0))
RETURNS [bit]
WITH EXECUTE AS CALLER
EXTERNAL NAME [DETECON_safe].[UserDefinedFunctions].[clrs_f_regexIsMatch]

The following messages were returned from the SQL Server:

[5701] Changed database context to 'DETECON'.
[5703] Changed language setting to us_english.
[0] Creating CLR assemblies
[0] Creating [dbo].[fn2_regexIsMatch]


The auto-deployed SQL -Sript for the UDF is:
USE [DETECON]
GO
/****** Object: UserDefinedFunction [dbo].[fn2_regexIsMatch] Script Date: 10/12/2006 14:00:59 ******/
CREATE FUNCTION [dbo].[fn2_regexIsMatch](@expressionToValidate [nvarchar](max), @regularExpression [nvarchar](max))
RETURNS [bit] WITH EXECUTE AS CALLER
AS
EXTERNAL NAME [DETECON_safe].[UserDefinedFunctions].[clrs_f_regexIsMatch]
GO
EXEC sys.sp_addextendedproperty @name=N'AutoDeployed', @value=N'yes' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'FUNCTION',@level1name=N'fn2_regexIsMatch'
GO
EXEC sys.sp_addextendedproperty @name=N'SqlAssemblyFile', @value=N'clrs_f_regexIsMatch.cs' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'FUNCTION',@level1name=N'fn2_regexIsMatch'
GO
EXEC sys.sp_addextendedproperty @name=N'SqlAssemblyFileLine', @value=24 , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'FUNCTION',@level1name=N'fn2_regexIsMatch'

The c# code is:
using System;
using System.Data;
using System.Data.SqlClient;
using System.Data.SqlTypes;
using System.Text.RegularExpressions;
using Microsoft.SqlServer.Server;
/// <summary>
/// Regex Funktionen
/// </summary>
public partial class UserDefinedFunctions
{
/// <summary>
/// eine Zeichenfolge wird auf Regex Match Kode geprüft
/// Regex-Optionen: RegexOptions.CultureInvariant | RegexOptions.IgnoreCase
///
/// $Archive: /Intranet/3 - CLR Intranet/DETECON_safe/clrs_f_regexIsMatch.cs $
/// $Revision: 2 $
/// $Date: 12.10.06 13:46 $
/// $Author: SqlAdmW $
/// </summary>
/// <param name="expressionToValidate"></param>
/// <param name="regularExpression"></param>
/// <returns>1 = Match, sonst 0, NULL = wenn einer der Parameter NULL ist</returns>
[Microsoft.SqlServer.Server.SqlFunction(
DataAccess=DataAccessKind.None
,IsDeterministic=true
,IsPrecise=true
,SystemDataAccess=SystemDataAccessKind.None
,Name="fn2_regexIsMatch"
)
]
public static SqlBoolean clrs_f_regexIsMatch([SqlFacet(MaxSize = -1)]SqlString expressionToValidate, [SqlFacet(MaxSize = -1)]SqlString regularExpression)
{
if (expressionToValidate.IsNull || regularExpression.IsNull)
{
return SqlBoolean.Null;
}
else
{
Regex regex = new Regex(regularExpression.Value.ToString(),RegexOptions.CultureInvariant | RegexOptions.IgnoreCase);
return regex.IsMatch(expressionToValidate.Value.ToString());
}
}
};