Activated Proc Not Firing.

Hi There

I just had the following scenario.

I checked sys.service_queues to confirm the my queue has an activated proc assigned to it and is activation_enabled.

I send messages to the service, however i see that the messages just sit in the queue. I run profiler with all SB and Error events there is nothing, i check the sql server log, there is also nothing.

So i have no idea why the activated proc is not firing, all i see in the profiler trace is that the messages are acknowledged but the activated proc does not execute.

For a while i was stumped. i then tried to execute the proc myself and i got a syntax error.

Basically what happened was that i altered a table that the proc used and now the proc cannot execute cos there are more columns that must be inserted so i altered the proc.

However the activated proc still did not fire.

I had to disable and re-enable activation for it to work.

What i am wondering is why was there no indication in profiler or the sql og as the the fact that something was wrong with the activated proc ? Surely the activated proc should have fired and given the same error i got either to the sql log or profiler ?

And why did i have to re-enable activation ? Does sql cache the proc when you activate it and not know that the proc has changed when you alter it ?

Thanx