What error did you get?

>I have a table with NVARCHAR(30) PK (I don't like nvarchar PK but that is a different story)
>Situation changed and 30 characters for PK is nolonger enough I have to change it to NVARCHAR(100)
>
>Here is the code to create the table:
>

>CREATE TABLE [dbo].[HandHeld](
>	[SerialNo]			[nvarchar](30) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL,
>	[LastUsedBy]		[nvarchar](30) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL,
>	[LastDownloaded]	                     [datetime] NOT NULL,
>	[Notes]			[nvarchar](500) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL,
>	[Added]			[datetime] NOT NULL,
>	[Modified]			[datetime] NOT NULL,
> CONSTRAINT [PK_HandHeld] PRIMARY KEY CLUSTERED 
>(
>	[SerialNo] ASC
>)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
>) ON [PRIMARY]
>

>
>Here is the code to change the table:
>

>ALTER TABLE [HandHeld] ALTER COLUMN [SerialNo] NVARCHAR(100) NOT NULL
>

>
>Now I thought all was good because it worked on my test machines and it worked on several customer machines until I installed the app for a Japaneese customer on his Japaneese laptop and the update statement failed.
>
>Why would this fail? Is there a SQL Server setting that prevents this?
>How can I do it differently?
>
>Thanks,
>Einar