FXO module rings out but pickup does not work


I have a TDM400P card with an FXO module. I use the 1.4.6 version of asterisk and the 1.4.3 version of the zaptel modules.
The problem is, when someone calls in from the line, it comes in like it should, but when I pick up the phone I hear nothing and the caller still hears the ringing. Like the system couldn’t pick up the line.
I tried some of the wctdm modules parameters to onfigure but nothing happens.

I get this message in console on pickup:

WARNING[483]: chan_zap.c:4110 zt_handle_event: Ring/Off-hook in strange state 6 on channel 63

Has anybody any idea?

Thank You!

same here did you ever solve this?