The purpose of this study is to compare LY2605541 and human insulin isophane suspension (NPH) using the following measures for participants treated for up to 26 weeks: * Change in participants' overall blood sugar control * The rate of night time low blood sugar episodes * The number of participants that reach blood sugar targets without low night time blood sugar episodes * The total number of low blood sugar episodes reported
Buenos Aires, Argentina
Caba, Argentina
Mar del Plata, Argentina