Smoke. . . .

Hi All:
This is my 3rd season with a Drolet 1400i. It is connected to a 6" liner which I cleaned a couple of weeks ago with a brush. When I cleaned it, I removed the top firebrick and the ash/cresote dropped into the firebox. The insulation blanket was pretty bad so I replaced it with 2300 degree 1" kaowool (12"w x 24"l). It was a royal pita to put the top brick back in place with the blanket in place. There is a metal framed octagon above the firebrick which is covered with the insulation. I fired it up tonight and the smoke comes into the house & will not stop. The blower came on & the smoke goes up the chimney with the door closed but the unit will not heat up like it has int he past. If I open the door, the smoke pours in. I have doors and windows opened and the cold air return on the furnace on to clear the smoke. I have had smoke in the past, but it always cleared after it warmed up. Good news is that all my smoke detectors work.
Any suggestions would be appreciated
Jim

I will take it apart tomorrow after it cools down to see where the channel is located and reposition the blanket. I could not get the spec on the original blanket so I do not know on thickness. The blanket probably had help when I took it apart as it was my first time. I can adjust the blanket through the flu tube.

When I put it back together the 1st time, I removed the flu pipe and placed the metal disc in the hole on top of the blanket. The blanket I put in is probably too big. The firebrick are 22.5" x9 and I used 12" x 24." Another thought is that when I dropped all of the ash into the firebox, it may have clogged the something. I will take it apart when I get home tonight. I also think I do not have the baffle in right. How does it go in?

Well, thanks to burleymike for pointing out the obvious. I emailed SBI and the specification is 1/2 inch. I have found it local and will swap out the 1" for 1/2" tonight.
I'll update after my fire