[Boris The Spider]

I was making a mission and decided I wanted a U-2VS as one of the static a/c. It wouldn't place. hock:
Then I tired adding one flying over the airfield. Although I could place the waypoints when I tried loading the mission I got the following INTERNAL LOADING ERROR message:
"Can't load Pilotg.mat".

UI 1.1.1 installed. Only mod planes are the B-29 Silverplate and RWD8 which came with the install and the Cant1007 and Sea Hurricane. I know the Cant replaces one of the DB-3's and the Sea Hurri is a 'new slot' plane so where did that dang little biplane go? Where do I need to check to see if it's been overwritten somehow or corrupted?

Thanks in advance.