measurement of phase difference between voltage and current in a RC circuit

[electrogeek7]

hello, please i am having problem calculating phase difference using NI multisim .i  set up the circuit using multisim .To measure the phase angle, i connected the channel B parallel to the voltage and measured the time difference between the two maximum value of V and I ( channel B and A) ie  (T2 - T1) . the problem is that  my theoretical value is not same as that i got in Ni Multisim. i am not sure if i connected the circuit rightly and also not sure if i place the cursor rightly. i am new with the software and also not experienced in using cursor in NI Multisim. I made several attempt without succeeding. attached is my attempt .Thanks in advance for the solution