You took the module for OpenERP 6.1 and you installed it on OpenERP 7, that's why you have this problem !
Please get the module for OpenERP 7 that is available in the branch lp:openerp-asterisk-connector and it will work perfectly well with OpenERP 7.
You took the module for OpenERP 6.1 and you installed it on OpenERP 7, that's why you have this problem !
Please get the module for OpenERP 7 that is available in the branch lp:openerp-asterisk-connector and it will work perfectly well with OpenERP 7.