Downloading ELF Process failed of Project

I'm not familliar with the de2-115 kit examples. I've used the Cyclone III developper board, which uses only one clock for the Ethernet connection and it works fine.

By driver I meant the C driver. The PHY chips drivers are in altera\xxx\ip\altera\triple_speed_ethernet\lib\sopc_builder\altera_triple_speed_ethernet\HAL\src\altera_avalon_tse.c

The 88e1111 is a supported PHY chip so you shouldn't see the text "PHY not found in PHY profile". This means you still have a problem with the MDIO communication. Maybe using a scope or Signaltap on the clock and data lines will help you find out what's wrong.

It looks like the PHY chip negotiated a 1Gb/s but the driver doesn't now that (as it can't communicate with the PHY) and switch by default to a 100Mb/s speed.