Problem asterisk whit PRI

Good afternoon:

I have a problem, when try to load E1(pri) in asterisk, I receive the following error:

Apr 23 19:05:28 WARNING[7128]: chan_zap.c:10855 setup_zap: Ignoring signalling
Apr 23 19:05:28 WARNING[7128]: chan_zap.c:10855 setup_zap: Ignoring switchtype
Apr 23 19:05:28 WARNING[7128]: chan_zap.c:10855 setup_zap: Ignoring pridialplan
Apr 23 19:05:28 ERROR[7128]: chan_zap.c:10286 setup_zap: Unable to reconfigure channel '26-40’
Apr 23 19:05:28 WARNING[7128]: chan_zap.c:11048 reload: Reload of chan_zap.so is unsuccessful!

The configuration is:

zaptel.conf
fxsks=1-16
span=2,0,0,ccs,ami,crc4
bchan=26-40
dchan=41
bchan=42-56
loadzone=fr
defaultzone=fr

too I try all the combinations with cas and hdb3

zapata.conf

signalling = pri_cpe
context = el
switchtype = euroisdn
pridialplan = unknown
group = 5
channel => 26-40
channel => 42-56

too put de parameter’s signalling = pri_net and swichttype=ni1, and have the same results.

I don’t know if my configuration is bad but I tried all posible variants and result are the same.

Tanks in advance.