Adding more than one column in sql server

[MyronCope]

I am trying to write a script to insert more than one column but the script I am making only inserts the column in the second line and I dont know why. In my code below, columnB is added to the table, but not columnA. I am stumpedMy sql is:<CODE>Alter table [dbName].[dbo].[tableName] Add columnA bit Default 0 Not NullAlter table [dbName].[dbo].[tableName] Add columnB bit Default 0 Not Null</CODE>thanks for your help.