Dibenzoyl-L-tartaric acid won't show up on HPLC chromatogram

I'm trying to develop a method for HPLC to detect dibenzoyl-L-tartaric acid. Concentration doesn't matter at this point; I'm only concerned with detection. The problem I'm having is the compound won't show up at any wavelength I've tried. I think I have the appropriate column (one specifically designed for organic acids). The run time is more than enough, the sample is essentially saturated and my injection volume is 25 mL. 


The compound seems like it would have a chromophore, so I've been trying wavelengths between 210 and 270, but nothing works. Literature also turns up nothing.


Can anyone steer me in the right direction?


