Purchased new NF 5.5 x 22 x 56 and when it arrived the reticle wouldnt illuminate. I attempted to adjust the setting, but still no change. After installing a new battery the reticle lit up immediately--I assumed problem solved. The next day I mounted the scope and again pulled the knob to illuminate the reticle and it would not work. Has anyone had problems with the illum reticles in NF scopes? I plan to contact NF directly but curious if this is common. Thanks