High Poly to Low Poly Question

[system]

Hi I have followed some tutorials on high poly to low poly and I seemed to grab everything okay. I am able to get okay results for most models I have made except when I get to attempting it with a character. I lose almost all facial features when I try to reduce the poly count. Is there a way I can prevent that?

Any advice would be great. Thanks

[Thor]

You need to supply more information about how you are doing this. Decimation master? Zremesher?
Screenshots of the problem would be helpful.