I'm having a problem with my 6 month old, propane, "BBQ Grillware" grill.
It worked fine until the cold weather set in. Here are the symptoms:

I have a spark from the ignitor and I can't light it with a match. So I
figure it is a gas problem.

The first time it happened I thought I was out of gas, so I changed the
tanks. With the new tank, the grill worked.

The next night, with that same new tank, it would not work again. I
thought... hmmm... "Maybe it has something to do with a cold tank!" I
switched the tank back to the original and it worked again!!! Boy... I
thought I was a genius... until it stopped working with both tanks, warm or
cold. :-(

What could be going on here? Regulator? Is there a way to check to see if
it is the regulator?

I apologize for posting off topic... you folks just seem to know everything!
;-)

Thanks...
--
PD