Powering Force 110 PTP Radio with Microsemi Inline POE

We have been experiencing trouble with getting this configuration to work even though both devices are both 802.3af compiant devices. Has anybody had experience with this configuration?

The strangest thing is that this will actually power on short jumpers in the office but in the field on longer ethernet lines it doesn't work. Any suggestions?

Microsemi 9524G:
Power over Ethernet Pin Assignment and Polarity:
Output Data Pairs 1/2(-) and 3/6 (+)
Spare Pairs 7/8 (-) and 4/5 (+)
Output Power Voltage: 54-57Vdc
User Port Power: 72W Typ.
Aggregate Power: 450W, 1000W

Force 110 PTP
Compatible with
Cambium PoE pinouts (V+ = 7 & 8, Return = 4 & 5)
and
802.3af PoE pinouts (V+ = 4 & 5, Return = 7 & 8)
23 – 56 V