Alter Stored Procedure in SQL Replication

How do I, properly, ALTER a StoredProcedure in a SQL 2005 Merge Replication?

I just need to add a Column. I already successfully added it to the Table and I now need to add it to a SP. I did so but now it will not synchronize with the following error -->

Insert Error: Column name or number of supplied values does not match table definition. (Source: MSSQLServer, Error number: 213)

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Yes the table change was already replicated. THEN the Stored PRocedure quit working as the columns were off so I did an ALTER on the stored procedure and tried to replicate that. Now it won't sync