First, I would suggest checking to see if your head, tail, body, and eyes are .jpg. If there is a mane, make sure it is .png. That is only if you are not using transparency or animation.
If you are using transparency or animation, I'm sure one of the other members will help me out with that since I've no idea how to help with that.
Second, if you are using two different coloured eyes, you have to fix the preset_3 material file to something like this:
material preset_3_eyeMatL
{
technique
{
pass
{
cull_hardware none
cull_software none
texture_unit
{
texture preset_3eyel.jpg
}
}
}
}
material preset_3_eyeMatR
{
technique
{
pass
{
cull_hardware none
cull_software none
texture_unit
{
texture preset_3eyer.jpg
}
Hope this helped.