hEX PoE and wAP power issue

Hello!

I have a strange issue with hEX PoE and 2 wAP powered by POE.

The connected wAP do not work when the POE is set to «auto-on», just «waiting for load» message. Everything works fine if I set ports to forced-on.

The cables are not very long, about 15m. With the test cable 1m long everything works fine. Cable should not be bad, but I never used them with PoE: http://www.legrand.com/ecat_export/032751-lan-cable-cat-5e-u-utp.html

All devices are on the latest version: 6.40.3.

Never had such issues before.

Could you please help?