After moving/installing the AGL7 module in my TG700+ the front panel locked and does not respond+ what happened?

After moving/installing the AGL7 module in my TG700+ the front panel locked and does not respond+ what happened?

The AGL7 module is the only TG700 module that cannot be placed in any slot. The AGL7 module must be placed in slot 1 (furthest from power supply). If the AGL7 module is placed in any other slot it will lock the TG700 with the message "TG700 : PRESET" displayed on the front panel continually.