[Problem] Boot freezes on /sbin/init after repack

I'm using Freetz revision 13373
I unpacked the firmware 6.30 for 7362SL using fwmod -u.
I made some modifications.
I repacked it with fwmod -p

I updated the FB with new firmware but during the boot it freezes.
This is wat I see using serial

Code:

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    [    2.340000] [avmnet] [avmnet_swi_7port_disable_learning] Configuring CPU-port                                                                              to receive all unknown unicast frames 0x68
    [    2.350000] [avmnet] [avmnet_swi_7port_disable_learning] Configuring CPU-port                                                                              to receive all unknown multicast frames 0x68
    [    2.460000] [avmnet] [avmnet_links_port_update] Maximum port number 0 exceede                                                                              d with 2!
    [    2.470000] [avm_event_source_trigger]: not registered
    [    2.470000] [avmnet] [avmnet_links_port_update] Maximum port number 0 exceede                                                                              d with 2!
    [    5.130000] [avm_pa_multiplexer_init] start
    [    5.130000] [avm_pa_multiplexer_init] init complete
    [    5.140000] [avm_pa_multiplexer_register_instance]
    [    5.140000]  add:avmnet_7port_pce_add_session+0x0/0x5a0
    [    5.140000]  remove:avmnet_7port_pce_remove_session+0x0/0x80
    [    5.160000] kernel_init: basic setup done
    [    5.170000] SQUASHFS error: Can't find a SQUASHFS superblock on mtdblock3
    [    5.170000] yaffs: dev is 32505859 name is "mtdblock3" ro
    [    5.180000] yaffs: passed flags ""
    [    5.210000] VFS: Mounted root (yaffs filesystem) readonly on device 31:3.
    [    5.210000] Freeing unused kernel memory: 212k freed
    [    5.240000] Warning: unable to open an initial console.
    [    5.240000] trying /sbin/init

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did I something wrong in repacking the firmware?

[Problem] Boot freezes on /sbin/init after repack