Heavy flavor production in Cu+Cu and p+p collisions at $\sqrt {s_{NN}}$ = 200 GeV

Heavy flavor production can serve as an important probe of the Quark Gluon Plasma. Single muon production is an important tool for studying heavy flavor production via semi-leptonic decays of open heavy flavor mesons. The PHENIX experiment at RHIC has the ability to detect muons over the range of 1.1 $<$ $\mid\eta\mid$ $<$ 2.25 using two back-to-back muon spectrometers. The first measurement of the nuclear modification factor of open heavy flavor production at forward rapidity in Cu+Cu collisions at $\sqrt{s_{NN}}$ = 200 GeV taken during 2005 run will be described. Also, results concerning heavy flavor production in p+p collisions at $\sqrt {s}$ = 200 GeV will be presented.