[asterisk-r2] TE4XXP: Version Synchronization Error!

[Joao Gomes Pereira]

Hello to all
I'm using asterisk 1.4 and dahdi.
I had everything working fine, and I could place calls through my R2 channel.
But now the channel is always "RED" and Im getting this error message:

TE4XXP: Version Synchronization Error!


Here is my chan_dahdi.conf------------------------------


[channels]
language=en
context=incomingr2

signalling=mfcr2

mfcr2_variant=ar


switchtype=national

mfcr2_get_ani_first=no
mfcr2_max_ani=20
mfcr2_max_dnis=9
mfcr2_category=national_subscriber

channel =>1-15,17-30

here is my dahdi config: --------------------

span=1,1,0,cas,hdb3
cas=1-15:1101
cas=17-30:1101
dchan=16

-------------------------------------------

What could be the problem?
Why was this working fine and now the channel is RED?

Thanks
Regards
Joao Pereira