Kill after upgrade to the last tomato

Hi !

I receive my wnr3500l today
I upgrade to dd-wrt  build min 13309 : success !
After I would upgrade to the last tomato : I download "tomato-NDUSB-9044MIPSR2-beta05u-Ext.ext" then I rename as "tomato-NDUSB-9044MIPSR2-beta05u-Ext.bin" and I give it to upgrade dd-wrt. And after a moment it ask me login/password. In this window, I could read "dd-wrt"... so what appen ? any idea ? why I don't boot on tomato ?

I try a reset on wnr3500L and on/off, but nothing else... I try some id/password (""/admin - root/admin - ...) but nothing do.
I try telnet : nothing, I try tftp : timeout !

Any idea ?
Thanks