  We present XMM-Newton observations of the 569 sec period system RX J1914+24
(V407 Vul). This period is believed to represent the binary orbital period
making it an ultra-compact binary system. By comparing the phase of the rise to
maximum X-ray flux at various epochs (this includes observations made using
ROSAT, ASCA and Chandra) we find that the system is spinning up at a rate of
3.17+/-0.07x10^{-12} s/s. We find that the spectra softens as the X-ray flux
declines towards the off-phase of the 569 sec period. Further, the spectra are
best fitted by an absorbed blackbody component together with a broad emission
feature around 0.59keV. This emission feature is most prominent at the peak of
the on-phase. We speculate on its origin.
