Where can i find a codec that will allow me to play M4A with windows media player for free? I would love to have the tags show up too but if thats not possible than i can settle for just having it play the files

I think CoreAAC directshow filter is what you need. That is if the m4a file holds aac encoded audio.
http://www.rarewares.org/aac.html

I'm not sure CoreAAC alone will work. Doesn't he need an MP4 splitter as well?

yes, you need a MP4 splitter as well
3ivx
to use with CoreAAC, go to 3ivx Config, Media Splitter, Check "Allow Unsupported Decoders"

3ivx isn't free though...

only the aac/mp4 audio encoder/decoder part is not free
the splitter, muxer, video encoder/decoder is free

you can still use 3ivx after the 30 days (with CoreAAC)

I believe their splitter is configured to not connect to third party decoders by default.

Solution for that (mark the right checkbox in config) was alread posted.

I just enabled the allow unsupported decoder option and its all working. Thank you all for helping me out.

This program have a bug , may be some guys already know that...
I don't know how to say,
If i say, my be i will violating the forum rules...
Or, may be i should report to 3ivx.