This is how I fixed my Inovix mp3 player known as IMP-5500
I followed the "Dead recovery guide" here and/or at s1mp3.org.
The main problem were the firmwares(the one I'm flashing my mpxplayer with and the one I install after the flashing.)
Working firmware for flashing your Inovix Ipocket (IMP-5500):
http://ivo-pz.com/~if/s1mp3/firmware...7v2.1b%20FM.fw
After the flashing I installed this one:
http://ivo-pz.com/~if/s1mp3/firmwares/imp5500B.bin
It's Chinese or whatever there 
It worked, look for the Settings Menu Icon, then third Option from top to down, then the second and you got English.
But better install this one(I'm currently using it) :
http://ivo-pz.com/~if/s1mp3/firmware...-_19-06-06.bin
The default language is set to English.And someone at inovixeu's forums said that it's faster than others.
From my experience with this crappy Inovix player - do not buy Inovix's players ;-) If you bought one, do not change the firmware (except self changes on it, with s1res for example).
Btw use 3.68 Mp3 utilities for best results with Inovix Ipocket (IMP-5500).
That's all folks.I had gain alot of experience about mpxplayers from this site and from s1mp3 and from #s1mp3 at freenode irc network, so I want to thanks to all who support these.
Just keep the good work.I'll still hang out around so if I can help I would
Have a nice day!