If the hub has a MDI-X port (also called an uplink port) connect the crossover into that port instead (usually on the far right end and may be switchable between MDI and MID-X (X or | |). That will un-cross the wires.

Edit: If your empeg gets an IP address (and it's actually getting an address over the network and not making one up on it's own) then you should be connected ok.