Dear Madhuri, You have worked as an HR Executive and now you have been designated as a BDE. Designations hardly matter; what matters is the work and authority. If you feel the work allotted to you is interesting and challenging, and moreover, you are confident to handle it, well, there is no reason to deny the new assignment. On the other hand, I always suggest that people of one branch should not restrict their knowledge and understanding to a particular area, but it should be manifold. HR people must know about production, marketing, accounts, business, etc., and vice-versa.
You may have expertise in any field, but hard work, study, good knowledge, sincerity, understanding, fairness, and such qualities are indispensable. I suggest you accept the new assignment and prove you are a good executive by accepting challenges.
Good luck.
Regards, Adv. K. H. Kulkarni