Pads too close error with DAC daughter card

I received to following error when attempting to send the required differential clock out to the "Data Conversion HSMC" daughter card from the Cyclone III Development Board. I am using the HSMC "B" connector because the the "A" connector has another card on it.

Error: Pad 283 of non-differential I/O pin 'DAC[0]' in pin location AE28 is too close to pad 286 of differential I/O pin 'HSMB_CLK_OUT_P1' in pin location AD27 -- pads must be separated by a minimum of 5 pads. Use the Pad View of Pin Planner to debug.

The problem here is that the data lines are hard wired through the daughter card, the HSMC connecter to the FPGA and I do not see a way the move the data lines away from the clock.

Any help appreciated.