I have a valid B1 visa till 2011, One of the employer in US is applying H1 for me this year - 2006. on my passport in place of my given name motioned as FNU and in place of surname my full name. if i get it changed from passport office by dividing my name in to given name and surname, will it effect my valid B1? 
Passport
Given Name :FNU
Surname : YYYY YYYY XX
Visa: FNU YYYY ZZZ ZZZ

Passport
Given Name :FNU
Surname : YYYY YYYY XX
Visa: FNU YYYY ZZZ ZZZ
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