Well...the part is the BACC "Thumper" Solid Fuel Booster, it is supposed to be test on the launch site, on Kerbin, and I am to activate the test through the staging sequence when all conditions are met. Kerbin and launch site both have green check marks on the contract tab when I am at the launch site. The part does not have a test engine tab when I click on it. I've tried launching a rocket with the booster, emptying the fuel from it, attaching the TT18-A Launch Stability Enhancer to it (to keep it on the pad through the launch sequence), I've even had my poor little Kerbal do an EVA from the top of the rocket, on the launch pad, while the engine was firing, and the Stabilitity Enhancer was attached, and still no completion (although I did get some nice science points from the EVA, radioed in, with a scientist, LOL...love this friggin game! Guys that came up with this game are geniuses.) I have completed 27 other contracts and this one is the only one giving me issues at the moment, it's got me stumped.