i peps, just a small problem that has me baffelled

I finally check rechecked and checked again my shuttle before bravely / stupidly took her up for the first time ( stupidly because i didnt use training gear )

I had her in a nice hover for the whole tank tried a few very basic moves and landed her, no crash to broken parts, ego in tact and everything..........

The problem is that after the very sucessfull maiden flight i can get the engine to start again, ive had the engine out checking for compression, glow plug has been replaced, wires to glow plug have been replaced even the glow plug starter, but the enigine does not want to fire up.

Any suggestions of why it went from perfectly fine to complete none starter in just one day ?