In iProcurement price is not changing automatically for the converted UOM

In iProcurement price is not changing automatically for the converted UOM .

Eg:

@ Form level below case works fine.

Item Code: 05320

Primary UOM: Each

Conversion Defined: 6 Each = 1 Box

Price for Each: 1.08$

If UOM is selected as Box in PR, system will show the price as 6.50$. If UOM is selected as Each, then price will change to 1.08$ automatically.

@ Iproc Level ,only UOM is getting changed but unit Price didt not getting changed.