Alter Table Not Working

My Alter Table below doesn't seem to be adding the column, any ideas why? I reference the column later in my TSQL and get a invalid column name error, and sure enough, when I check the table the column is missing.

-Thanks
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CREATE PROCEDURE [dbo].[sp_alk_populate_cust_to_pledge_tbl] AS
-- This procedure should go through each customer and populate the TEMP Table MI_Flat_Customer_Pledge by using Table mi_pledgehold.
-- Table mi_pledgehold is a replicat of the needed info from pledgehold with the addition of an actual primary key
-- Table MI_Flat_Customer_Pledge changes the one to many relationship between Customers and Pledges into a flat table for reporting
-- Table MI_Flat_Customer_Pledge will only show 10 pledges
DROP TABLE dbo.mi_pledgehold
SELECT [cust-num], [loc-id], [pledge-amt], [ticket] into [dbo].[mi_pledgehold] from pledgehold
ALTER TABLE [mi_pledgehold]
ADD [mi_pledge_id] smallint IDENTITY(1,1)PRIMARY KEY
-- Drop and Create the MI_Flat_Customer_Pledge
DROP TABLE mi_flat_customer_pledge
CREATE TABLE dbo.mi_flat_customer_pledge
(
[cust-num] int,
[pledge-amt0] numeric,
[pledge-amt1] numeric,
[pledge-amt2] numeric,
[pledge-amt3] numeric,
[pledge-amt4] numeric,
[pledge-amt5] numeric,
[pledge-amt6] numeric,
[pledge-amt7] numeric,
[pledge-amt8] numeric,
[pledge-amt9] numeric,
)
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