Can i with that miner mine only with CPU or also with GPU (sapphire r9 280x)

gpu

great

why i cannot connect to the server

because is it in maintenance mode or am i doing something wrong

Launching miner...
Initializing GPU 0
Initializing Device: Tahiti
Platform 00: AMD Accelerated Parallel Processing
Device 00: Tahiti
Device 01: AMD A6-6400K APU with Radeon(tm) HD Graphics
Initializing GPU 1
Initializing Device: AMD A6-6400K APU with Radeon(tm) HD Graphics
Platform 00: AMD Accelerated Parallel Processing
Device 00: Tahiti
Device 01: AMD A6-6400K APU with Radeon(tm) HD Graphics
xptClient_addDeveloperFeeEntry(): Invalid checksum
Connected to server using x.pushthrough(xpt) protocol
Connection to server lost - Reconnect in 45 seconds