SQL 2008 Encryption compatiblilty

Question

My client use SQL Server 2008

I Develop my stored procedure in SQL version 7. before I send my stored procedure to my client. my stored procedure has been ecnrypted (with encryption), then I generate sql script for this stored procedured. (content script file has been encrypted).

but Now, this script cannot run on sql 2008. why ???? this script can run in SQL 2000, 2005.

Any sollution for this probelem.

Thanks