LTSpice doesn't correctly simulate Arbitrary Behavior Voltage


I'm trying to model some physical phenomena in my design that solicite using of some kind of Gaussian function.

For realize this function I use Arbitrary Behavioral Voltage Source (ABVS).

But it doesn't work.

In the attached schematic I check the behavior of ABVS performing DC sweep.

The the voltage generated by this ABVS (B1) depends on current through resistor R1 and should manifest Gaussin peak close to the median current which is 1.2u.

But it doesn't !!!

The value doesn't change during whole DC sweep 0 ... 5u.

For comparing I put also other ABVS B2 ... without curent dependency.

The sweeps on B1 and B2 coincide.

Where is a problem.

Help, please.