Problem rigging tiger model

[efonsecab]

I am trying to correctly rig a tiger model I downloaded, in order to animate its walking to later be used in a unity3d game, however I got into an issue where I need help, I created the bones and are already inside the mesh , then I did apply a skin modifier, and use the technique of setting some weights to 0 and exclude them from the bones that do not have to affect those sections, but Im still having the issue when I move the legs bones, some sections of the body are affected so the mesh deforms . may I get some help with it?
Added url of mesh :
http://www.pti.co.cr/My3dModels/Tiger_With_Bones.max
Thanks.

[efonsecab]

Added the link to the max file, if you see when I try to move the back right leg, the mesh deforms, any guidance on what I'm doing wrong?
Thanks.
http://www.pti.co.cr/My3dModels/Tiger_With_Bones.max

[Viscte]

Add me on skype or steam, my name is Viscte.

[efonsecab]

Hello Viscte, sure I'll go ahead and add you to Skype, my contact is efonsecab.

[Viscte]

I never got your request.

[efonsecab]

Oh really? I did add you, but no problem, Ill try again.

[Viscte]

Oh really? I did add you, but no problem, Ill try again.

Alright, you're added. You'll need to go online so I can help you.

[efonsecab]

Cool Thanks. I'll be online the rest of the afternoon and tomorrow afternoon too, just in case my timezone is GMT-6

[libertycityanimation]

Some time when your mesh deforms it's because the bone or biped is not in the mesh correctly. I could not open your file because i have a lower verison. If you can upload them file to youtube then i MITE able to help you more! i know a bit about rigging but not a lot.

LCA