There could be many reasons...
Working with programs like BrawlBox and using DAEs will always be a problem. 3DS Max is not the simplest thing to use, and BrawlBox doesn't specifcly point out errors, atleast not in anyway that's easy to understand.
I suggest checking how you weighted the mesh to the arm bones, perhaps they became inverted because the attached them to the wrong sides?
I don't see how it can crash, yet you see that it does not have arms. Make sure you are using the current version of BrawlBox, and I suggest using the FBX Converter and first exporting as FBX from Max then converting the DAE from there. You should also check the Modifiers list in Max and make sure that nothing other than what may be necessary is applied, and only those that would be usual (Like Poly, UV, Skin, Optimize, ECT) is used.
I suggest selecting the Spin dummy "bone" and checking if it has Skin applied. if so, delete. BrawlBox will not accept that and it will result in a crash.
Last edited by SuperMario64DS; 09-10-2012 at 10:10 PM.