Colour Management with Epson R3000

I recently purchased an Epson R3000 and am having terrible trouble with the colour management from Corel. Everything I output has a very yellowy/browny caste over it when compared to my screen (for example a slightly warm grey comes out brown-grey and light blues come out very murky in colour tone). I have applied Adobe RGB (1998) to the document, opted for Corel to manage colours and turned off colour management in my printer. I am also using IC profiles specific to my papers. My monitor is self-calibrated but up until now the colour difference between screen and output device has never been a problem. Does anyone have any suggestions about where I am going wrong...