When I initilize an LPD3DXBUFFER, it is set to 0xcccccccc (which I found out using the debugger). As a result of this, LoadMeshFromX is failing. Here is the delcaration of the variable:
LPD3DXBUFFER matbuff;
// is 0xccccccccit is just like the example provided by DX, why should this occur? If you would like, I will post the entire function. ( I am not sure why this text is green)
A quick search in the documentation will reveal that 0xCCCCCCCC is a special code inserted by the VStudio debugger to indicate an uninitialized variable. It's intentionally put there as a flag to you indicating your code is badly written 
I don't know the surrounding context, but you need to initialize it - either to NULL or actually create a buffer for the call you're trying to use.
hth
Jack
Often u have to initialize a stucture.
Return error:
DEVMODE* dm
;if ( !EnumDisplaySettings(dd.DeviceName, ENUM_CURRENT_SETTINGS, dm) )return E_FAIL;
Correct way:
DEVMODE dm
;dm
.dmSize = sizeof(DEVMODE); if ( !EnumDisplaySettings(dd.DeviceName, ENUM_CURRENT_SETTINGS, &dm) )return E_FAIL;