MS/SQL OpenQuery to linked DB2 Server error

I have a SPROC that takes in parameters and uses OpenQuery to create a record in an AS400 DB2 table.   It works fine from my development server ( MS/SQL 2008 R2 ) but not from my production server ( MS/SQL 2008 R2 ).  The Linked Server to the AS400 is identical on both servers.  My production server returns this error:

A syntax error was detected at token ..  Token . is not a valid token.

The SPROC is attached.

I'm calling it as follows:

declare @result smallint
exec [dbo].[sprocAS400_Insert] 'VALUE1', 'VALUE-2', 'VALUE-0-3', 'VALUE4', 24, @result OUTPUT
select @result

above works fine but only from my test server.  The full error message ( also attached ) doesn't give me anything to go on - any suggestions?
sprocAS400_Insert.sql.txt
sprocError.txt