Changing Databases In While Loop

I am trying to run an update query for 2 identical databases. I am using SQL 2000. Here is the code for the loop.
--*****************************
USE DB1
Declare @Locnum1 integer
set @Locnum1 = 0
While @locnum1 < 2
BEGIN
Update OpenJob
Set JobN = 15
WHERE (OpenJob.CustomerN = 183)
USE DB2
Set @Locnum1 = @Locnum1 + 1
END
--*****************************
When I run this code it runs the update query on DB1 twice instead of switching to db2. Any help you can provide would be greatly appreciated.

Thanks,

Jason