Unable to see Custom Account form in dynamic CRM

Hi All,

I have 1 custom account form and other OOB form and i have 2 users, user A and User B with system admin role for both users. On both the form i have enable security for all the security role. Now i am able to see both the account form from User A but not from the User B. From user B i am only able to see OOB account form but not the Custom one.

Thanks,

Shahbaaz