Problems setting up Motorolla GM300

I just got a reconditioned GM300 but I seem to have it set up wrong. The channels seem to be programmed correctly as I can transmit to an HT and receive the signal fine. But when I try to receive on the GM300 I hear nothing. I have tried it with the squelch both on and off. When the squelch is on the tx light flashes. The speaker seems fine since the volume of the static with the squelch off is deafening.

Thank you for any help.

Respectfully,
Phil