Strange Warnings -- Help me!

Hi all,
I’m running Asterisk 1.4 on Debian.

I installed a TDM400 card with 1 FXS module and 1 FXO module. I have problems making outgoing calls (to PSTN). From the console I can see the following error:

[May 10 15:33:04] WARNING[19192]: chan_zap.c:1614 zt_set_hook: zt hook failed: Device or resource busy

and I don’t know what it means.

I noticed now that while loading the console I have some warnings:

[May 15 10:45:30] NOTICE[27396]: pbx_ael.c:3930 pbx_load_module: AEL load process: compiled config file name ‘/etc/asterisk/extensions.ael’.
[May 15 10:45:30] NOTICE[27396]: pbx_ael.c:3933 pbx_load_module: AEL load process: merged config file name ‘/etc/asterisk/extensions.ael’.
[May 15 10:45:30] WARNING[27396]: pbx.c:6235 ast_context_verify_includes: Context ‘ael-local’ tries includes nonexistent context ‘ael-parkedcalls’
[May 15 10:45:30] WARNING[27396]: pbx.c:6235 ast_context_verify_includes: Context ‘ael-dundi-e164-local’ tries includes nonexistent context ‘ael-dundi-e164-canonical’
[May 15 10:45:30] WARNING[27396]: pbx.c:6235 ast_context_verify_includes: Context ‘ael-dundi-e164-local’ tries includes nonexistent context ‘ael-dundi-e164-customers’
[May 15 10:45:30] WARNING[27396]: pbx.c:6235 ast_context_verify_includes: Context ‘ael-dundi-e164-local’ tries includes nonexistent context ‘ael-dundi-e164-via-pstn’
[May 15 10:45:30] NOTICE[27396]: pbx_ael.c:3936 pbx_load_module: AEL load process: verified config file name ‘/etc/asterisk/extensions.ael’.
pbx_ael.so => (Asterisk Extension Language Compiler)
== Parsing ‘/etc/asterisk/codecs.conf’: Found
– codec_alaw: using generic PLC
[May 15 10:45:30] WARNING[27396]: translate.c:675 __ast_register_translator: plc_samples 160 format 6

Can it be related? I think it’s something in extensions.ael file, but i don’t know how to solve it.

Thank you for your help!

Since you are not using AEL, you can unload pbx_ael.so

Also, in modules.conf, put in

noload => pbx_ael.so