mobile

Hi all,

to make it plain and short: I messed up.
I have a GT-S5830i which I unrooted according to the Sticky Note in the forum, installed CWM Recovery and then 'installed from ZIP' a CM9_cooperve_Beta_05.zip that I found in one of the posts in the forum. The installation went on without error message but since then the phone does not make it beyond the initial screen "Samsung Galaxy Ace GT-S5830i". I can start recovery mode and Download mode. In reovery mode I can format cache, data, sdcard, sd-ext but *not* system. Error Message: "E: format_volume: make_ext4fs failed on /dev/block/st19"

I have tried already several methods according to the forum, e.g.
1) 'install from ZIP' older Cyanogenmod
2) the tool ext4_formatter.zip
3) re-flash with ODIN with several tar-ROMs, all failed. Odin finds the phone (since I start Odin as Admin now), but after I hit 'start' it tries to establish a connection to the phone and ends after a while with 'Failed'

I'm basically lost now, don't know what else to do. Any advise is appreciated (it's my mom's phone, she is getting impatient ;) )
Thx, cheers!
Xala