simulink model connections related query!

hi i am a student new to model based approach of simulink trying to simulate CMOS structure for last 2 days but not getting success just because of 2 connections i am unable to perform i.e 1) from pulse generator to input line of cmos through S PS converter and 2) from output line to scope through PS S converter . it always showing red dotted lines when i am connecting these 2 please help me out of this problem! i am using simscape and simelectronic and spice compatible libraries! thank you!