Rule on CR not working

Hello Expert,

I have create a some rule on standard material change request on some fields in Material MDG trough BRF+ . Like

If Material Type is Equal to 'FERT'

Then Material Group is '01'

Else Log   Action Message 'Select Material Group as 01 '. Shows as Error Message .

When I simulate the Rule in BRF+ is working Fine .

After everythings  get activated in BRF+ .

when I am trying to create CR and giving some value there like  Material Type  is Equal 'FERT '& Material Group 'XY'(except 01) . It is not showing any error message, which I define in Rule .

Any help would be appreciated.

Thanks

Nikhilesh