[USR-TC] USR TC Dialback (Callback)

Dear List, Does anybody here have working dialback (callback) on USR TC 1000 with NetServer PRI card and Radius authorization? If yes, how we can to set up this feature? We made all the necessary as the manual says, but we have the folloving string: Feb 6 22:38:32 tc dialnet: port S50 denis dialback requested to Radius is unable to send the dialback location to TC. Thanks in advance Denis