What's wrong with MechJeb

[SamGreat2002]

I usually launch landers by myself and never fails. But now it's getting boring and I downloaded MechJeb. I don't know anything about MJ, so I just launch my lander near the Duna and started the Autolanding. I don't change any setting, I usually orbit the lander first before landing, but MechJeb just fired up the rocket to Duna and turn the rocket upside down to slow down the rocket like what I usually do. But the rocket exploded into pieces. I definitely can't use the parachute, they will broke apart if I open it (I have 30 on my rocket) Can anyone help me how to use this Autolanding?

[Red Iron Crown]

Mod-related question moved over to Add-on Discussions.

[Seeker89]

I have problems with MJ when I'm using the autolander when I'm not in a orbit around the planet, or when I start it really high up. I don't know if this is the problem you are having, but it is something to think about... 

[genericeventhandler]

always start de-orbit from the lowest orbit possible, make sure you have air brakes and drag chutes for atmosphere worlds, turn of all limits, esp Q and G.